This item exceeded my expectations, therefore I had to write a review about it.I have two boys, one is 13 and one is a year old. Both are big kitties, one is 16 lb and the other is 12 lb. Big solid boys. They love running through this chasing each other and the tubing is large enough to accommodate both of them running in and out of it. They chase each other through it, they'll play with the little dangly items in the entry holes, and I've even caught them sleeping in the tube, just relaxing. They don't seem to use the middle bed very often on their own, but whenever I put the young one in there he likes to knead it like pizza dough and fall asleep.Everything is connected by zippers, and there's toggles on the ends of the item that helps you to secure it when you need to collapse it. Very portable for anybody traveling, and very easy to clean the bed portion in the middle, you can just take it out and throw it in the dryer occasionally to freshen it up. Seems like it would last well through the washer too. Good craftsmanship, no loose seams to where the spring would show through even after several hours of their rough housing, and it's a big tunnel. It's bigger than I expected it does take up a decent amount of space on the floor, which is excellent because I have two big kitties and I wanted to make sure they had something they could easily play with and run through and enjoy, and they are doing just that. Definitely one of my favorite cat accessory purchases that I've bought. This and that smart cat scratching post tower where it's all covered in sisal. Two of their favorite items. Happy spoiled kitties, just the way we like it.