Great concept for a doggy stroller because it can be used to haul other stuff as well. It makes a great little cart for anything. It was easy to attach the wheels but a bit confusing as to how it all actually unfolded correctly and completely without bending the frame or causing damage. Once it was finally opened all the way and the basket and wheels attached, I hesitate to ever close it again for fear of not getting it open correctly a 2nd time. I dunno, call me slow! It rolls fine and all but only 3 of 4 wheels touch the ground at 1 time sometimes. However, it doesn't seem to effect the mobility of the stroller much if at all. We cruize the aisles of TJ Maxx just fine. My 11lb Dachshund fits in the basket/box area well and if standing on her hind legs looking out, even has room for another small sized doggy pal to join her. Good times had by all! A great buy for the price. Especially compared to other traditional dog strollers out there.