I have 2 cats. One is huge about 20 ilbs and it fits him perfect! Both my cats love zipping through the tunnel. When not in use, it easily folds up.

I had a space behind my new powered recliners that allowed my cats to get behind them and start to do terrible things to them. Which is kind of a problem when they were almost $2k for the pair of them. I had the bright idea to add a tunnel to the space and they haven't touched the chairs since (at least not the backs anyway lol). My senior cat loves them. I constantly hear crinkling noises come from behind me and I know she loves wrestling with the ball on the string. Today I watched her pop out one end, pop one of my dogs then slide back into the tunnel it was pretty comical. Also I think she's actually playing with my younger cat who she normally just hisses at. So in summary it's done a lot for my chairs and for my cats well being. I also purchased a shorter length tunnel and connected them together to span the entire distance of the back of my recliners. It just hooked on with the little loops that are designed for collapsing and storing.

Would totally buy again if this one ever wears out or I need another one somewhere else in my house.

Overall I'm pretty satisfied with it and so is my cat. The quality is good and it seems more durable, thicker, and I expect it to last longer than the colorful nylon/thin cloth ones out there. It seems to have just the right amount of crinkle, not to much, not to little. The windows are big enough my slightly overweight full grown cat doesn't have a problem crawling through. The openings and each end are more than enough and would probably be ok for small dog too. It makes a good addition to my cat's environment. I think he feels safe in it, somewhere he can go and hide, play in, dark place to take a nap big enough to stretch out in if he doesn't want to sleep curled up in a house, etc. I'll toss a toy inside for him to run in after, he likes to ambush toys through the windows.

The major issue: The black plastic toggles used for hooking tunnels together and for fastening it together when collapsed for shipping/storage are a problem. Within two minutes of setting it up my cat thought they were dangling toys to play with and chew on. I cut them off with a pair of scissors tossed them in the trash because it would have probably taken my cat a day or two to chew them off and try to swallow them. I plan on leaving it unfolded all the time and I probably won't hook on any additional tunnels to it so it's not a big deal, you don't even notice they are gone.

My cat loves it! He goes crazy going in and out of the tube. It's also easy to put away, which is a big plus if you have a small apartment.

Nicely made, no complaints here. My cats love the crinkle sounds.