Britax Willow Brook S+ Baby Travel System: An Honest Travel Review
The Britax Willow Brook S+ baby travel system is a full-size travel system, and that is the first thing to understand about it. It…

The ergo baby travel stroller most parents mean is the Ergobaby Metro+. It is a compact stroller built for one job: folding small enough to go into an overhead bin, so you keep a stroller with you through the airport and onto the plane. The base model weighs 17 lb, folds to 21 x 17 x 9 inches, and suits children from birth up to 50 lb. That is the whole case for it — and the case against a full-size travel system is exactly this difference in weight and fold.
So this is a different kind of review from the Britax system. The Britax Willow Brook S+ is a 26 lb full-size system for the car and the destination. The Metro+ is a 17 lb cabin stroller for the flight itself. Buy it for the airport and the plane, not as a replacement for a full-size pushchair at home.
| Spec | Metro+ (base model) |
|---|---|
| Weight | 17 lb (7.7 kg) |
| Folded size | 21 x 17 x 9 inches (53 x 43 x 23 cm) |
| Unfolded size | About 34.25 x 17.32 x 37.8 inches |
| Weight limit | Up to 50 lb (22.7 kg) |
| Age range | From birth to 4 years |
| Seat recline | 95 degrees upright to 175 degrees, near flat |
| Handlebar | Adjustable, 96 to 105 cm from the ground |
| Fold | One-hand fold, with a manual fold lock; stands on its side when folded |
| Storage | Under-seat basket up to 2.2 kg, plus a seat-back pocket up to 1.4 kg |
| Car seat use | Compatible with an infant car seat via adapters, sold separately |
Price is not listed here on purpose: prices and versions change, so check the current price before buying — and confirm you are looking at the base Metro+, not the Deluxe, which weighs 18.1 lb.
The fold is the reason this stroller exists. One-hand fold, a manual lock that keeps it closed, and a folded size of 21 x 17 x 9 inches — the size the manual gives for fitting most airplane overhead bins. Folded, it stands on its side, so the handlebar and seat fabric do not touch the ground while you wait at the gate.
That “most overhead bins” matters. Bin sizes differ by airline and by aircraft, so a Metro+ that fits one plane’s bin may not fit another’s. If you are flying with a baby for the first time, check your airline’s cabin baggage size before you travel, and carry the folded measurements with you — 21 x 17 x 9 inches — so the plan works at the gate and not just on paper.

At 17 lb, the folded stroller is also light enough to lift into a bin with a baby on your other arm. That is the real test of a travel stroller, and it is where the Metro+ earns its place: a 23 lb full-size stroller fold is a gate-check, while a 17 lb cabin fold stays with you.
The seat is the second reason to take this stroller seriously. It suits a child from birth to 4 years, up to 50 lb, and it reclines from 95 degrees upright to 175 degrees — near flat for a newborn. The Newborn Nest mode is built in, so a newborn rides in the same seat without a separate carrycot to buy or carry.
The adjustable handlebar, from 96 to 105 cm, is a small detail that matters on a long day: two parents of different heights can push the same stroller without stooping or reaching. The seat back is 45.75 cm with another 10 cm of headroom, so a toddler has room to sit up and look around, not just to sleep.

First, it is genuinely cabin-sized. At 17 lb and 21 x 17 x 9 inches folded, the Metro+ is built to go into an overhead bin, not to be handed over at the aircraft door. For a parent who flies often, that is the difference between having a stroller on arrival and waiting for one at the gate.
Second, it lasts. From birth to 4 years and up to 50 lb, with a near-flat recline for a newborn and a proper upright seat for a toddler, the same stroller covers the whole early-childhood stage. A travel stroller that only works for six months is a poor buy; this one is built for years of use.
Third, it needs no extra purchase to start. The Newborn Nest mode is built in, and the seat works from day one. Car seat adapters are sold separately, so if you want to click an infant car seat onto the frame, that is an extra — but the stroller itself is complete without it.
The storage is small. The under-seat basket holds up to 2.2 kg, with another 1.4 kg in the seat-back pocket. That is enough for a few nappies, wipes, and a bottle — not for a full day’s kit. Pack the flight bag as your main storage, and treat the basket as a top-up, not a suitcase.
The car seat adapters are a separate purchase. The Metro+ is car seat compatible, but the adapters are not in the box. If you planned to click your infant car seat onto the frame from day one, budget for the adapters and check they fit your car seat before you travel. Our travel car seats guide covers which seats are approved for use on a plane and which are car-only.
The third thing to know is the Deluxe trap. The Metro+ Deluxe weighs 18.1 lb with the same 21 x 17 x 9 inch fold. It is the same size, a little heavier, and a different listing. If you buy by name alone and land on the Deluxe, the 17 lb figure in this article does not apply to your stroller. Check the model name on the listing before you buy.
On a flight, the Metro+ is the stroller that stays with you. Fold it at the gate, lift it into the overhead bin, and it is waiting when you land — no gate-check wait, no worry about how it was handled in the hold. If the bin on your aircraft is smaller than the folded stroller, gate-check the stroller at the aircraft door instead, so it is waiting when you land.
By car, the Metro+ is the light second stroller, not the family car stroller. It folds small into a boot and carries a baby from the car to the pavement, but a full-size system does the heavy work at the destination. The honest comparison is with our Britax Willow Brook S+ review: 26 lb, a 9.2 lb car seat, and a stroller that lasts from birth to 50 lb — a system for the car and the destination, where the Metro+ is a stroller for the flight.
At the destination, the Metro+ is the everyday tool for pavements, shops, and airports, and the small basket is the limit to plan around. If you are staying in a hotel with a baby, the stroller handles the lobby and the street, and the flight bag carries what the basket cannot.
The base Metro+ weighs 17 lb (7.7 kg). The Deluxe variant weighs 18.1 lb with the same fold — check the model name before you buy, because the 17 lb figure is for the base model only.
It is sized for most overhead bins: folded 21 x 17 x 9 inches. Bin sizes differ by airline and aircraft, so check your airline’s cabin baggage size before you travel.
From birth to 4 years, up to 50 lb (22.7 kg). The seat reclines from 95 degrees upright to 175 degrees, near flat, and the Newborn Nest mode is built in.
Yes, with adapters sold separately. The stroller itself is complete without them — the adapters are only needed if you want to click an infant car seat onto the frame.
The under-seat basket holds up to 2.2 kg, and the seat-back pocket holds up to 1.4 kg. Pack the flight bag as your main storage and treat the basket as a top-up.
Yes. Prices and versions change, so check the current price before buying, and confirm you are looking at the base Metro+ — 17 lb, not the 18.1 lb Deluxe.