I got this to use for two little tiny dogs, that I fostered while their owner was having medical problems. I have two larger dogs myself, so trying to walk everyone was complicated - especially since the little ones weren’t leash trained.This stroller is great! It was easy to out together - the wheels popped on, secure with cotter-type spring pins. Very secure. The tires being air filled make pushing it in uneven, unlaced terrain very manageable. I often push it with both pups in on uneven, grassy terrain around a pond, with my GSD and Beagle in tow.It’s pretty easy to collapse, although, I’m not sure yet how to keep it from opening back up as soon as I try to put it in the car - but I’ve just used a Velcro strap repurposed for this, and it works fine.The no-zip closure is such a helpful design feature. The little dogs love riding in it, they feel secure, and being eye-level with the bigger dogs makes them still feel like they are part of the walk.My GSD is 80 pounds, and I put him in it (without the canopy) and he enjoyed it also for a treat - he just lay down and rested his head on the edge. It definitely does hold at least 80lbs easily. No creaking, warping or bending.I bought this as an open box item, for a discounted rate, and say it was with it. I don’t know if I’d have tried it if it was full price, but this is study and works very well.I don’t like that it is made in China - but it’s almost impossible to find these things made anywhere else anymore. ?I like the locking wheel in front, for jogging - and I did test it out with my GSD in it for a mile and it is steady, and moves easily.