Easy to assemble; great cargo space underneath; nice wheels; easy to control; won't tip; definitely true to size...will not fit dogs sized larger than 20 lbs. I am now getting the larger size because I didn't even realize my dog was such a fatty. She is really 28 lbs! hahaha! That little pork-pie! She fits but just that! She can just sit up in it and she is a pretty girthy cocker spaniel. I think of her as small but she isn't. Size up if you want more space. I just ordered the next size up (30 lb-er) and it arrived. I haven't opened it yet. I am not returning the small one, however. I like it so much, I use the top part for my micro-teacup Morkie as a roll-around playpen. He likes to be where the action is and this way I can toss his toys in there and a puppy pad and roll him from room to room without having him underfoot when people are here who can step on him. Oh, by the way, I was putting the Morkie below in the cargo space of the first one and plan to do the same with the second one. It gives him a 360 degree view and won't make him addicted to a bird's eye view and spoil him for when he is put on a leash as carrying him will. I use a leash joiner to strap him in there in case he decides to climb out with his sharp puppy nails. We look so cute walking we can hardly get 10 feet before we draw a crowd and have everybody snapping photos with their cellphones...hahaha! I look forward to the black stroller this time, because the blue was kind of bright...and, I think I got the cup holder model this time as well...that helps...a glass of chardonnay in the evening and some caffeine in the morning keeps my spirits positive and makes sure I walk as long as I should.