I bought this stroller to transport cats to vet. The problem with most strollers is that the bag/housing part is usually attached to the frame. If you take a dog somewhere, you can move him from the stroller into the car, then fold up the stroller & take off. A cat, however, needs to stay in his bag when being put into the car. I specifically chose this stroller because the bags are removable from the frame. Thats about the only thing good about this product.You can see in my pictures how nonsensical the instructions are, tons of spelling & grammer errors. The illustrations start with a bare frame but the stroller arrives with the bags already attached to the frame. You actually have to dissemble it before you assemble it. The packaging is horrible. They basically covered the metal parts in shrink-wrap and THEN bolted it together... so, when you pull off the shrink-wrap, it will leave little shreds of ripped plastic stuck in the bolts. The foam-ish wheels have “brakes” on them which stop the wheels from spinning, however the stroller can still slide across the floor with the brakes engaged.The carrier bags are probably the worst part of the whole design. They are huge & could probably fit 2 cats in each bag, but the max weight for the flimsy frame is only 33 pounds. The bags themselves are quite heavy without any cats because they have heavy metal bars running through the inside of the bags to keep it “popped” open. You can fold down the bars to flatten the bags for storage. With all the metal, plus the weight of a cat, you’d think these bags would have some heavy duty strap or handles, but this by far the stupidest handle situation I’ve ever encountered. Most bag type carriers would either have a long strap running across the top, from front to back ... or 2 handles - one each on the top of the left & right sides. This bag has straps that are sewn onto the BOTTOM of the bag, one on the bottom left and one on the bottom right, as shown in my picture. This means that you always have to use TWO hands to gather the straps together because they always flop to opposite sides whenever you place the bag down, instead of just sitting on top of the bag. When you actually hold the bag up with a 10 or 15 pound cat in it, it feels so unbalanced and shifty because the straps have to stretch all the way from the bottom (where all the weight is) and end up pushing into the sides of the carrier, making kitty feel like the walls are caving in. I really dont understand what this designer was thinking with the straps but if your cat moves around a lot and you happen to lose grip on one of the straps, it will be a frightful tumble, flipping the carrier (and the cat) upside down. This would never happen with the typical top-sewn handle that you see on every other carrier, as well as handbag, purse, shopping bag, etcMy only reason for not returning is because I’m pretty crafty and I should be able to modify or sew some better straps onto the bags. If not, I’ll keep them in the house as cat teepees and I’ll just use the frame with my old carriers by adding some velcro or snaps so that the carriers can be secured yet removable.