Bests & Worsts Reviews from Amazon

I bought this because the weekend before - at PetSmart - I'd bought a MUCH smaller version than this crackle tunnel, and I was so impressed with my cats' playfulness of that tiny tunnel, I wanted a BIGGUN! We have 5 MALE CATS (all neutered, but they don't know that), indoor only, fat, happy, and PLAYFUL during that 2 hours or so they are not passed out on the nearest blanket. When these boys play... they PLAY. Divebombing each other, cornering, sneaking around corners doing that huddle-butt-pounce thing... so I knew getting a bigger tunnel would fit the bill, since they'd already put many fine hours into the small tunnel from PetSmart (that one was only about 10 inches long; this one is almost three FEET long!). For anyone concerned about the SIZE of your cat? Do not be concerned. Our largest boycat is Hammie - he is 25 pounds, and round in every feature; dude is a blob with paws. He gets into this thing and while he does rub the sides a tad, he DIGS it! No problems getting in and out. The smaller cats (ranging in size from 12 pounds to 20 pounds, then there's 'Hammie'), ZERO problems, they race through this thing, dive bomb it, dive bomb each other... and the opening in the middle, at the top of the tunnel - somehow this tunnel rights itself, so that 'peephole' opening stays at the top! Even while dive-bombing is in process. We were both sorta stunned to see our 16 year old cat, Zorro, ALSO get into this tunnel. While he does not and never did ever 'play' (he's like Grumpy Cat on Valium, with a mean streak), he actually got in there, purred, and stayed there for awhile... he liked something!?!?!?! It's easy to set up - just untie the strings and stretch it out, voila. It's NOT meant for a bedroom; keep it in a room where there's noise, cuz it's noisy. The crackle sound does what cats like best - makes them feel like they are doing a whole hella damage to something (like the cats in the paper bags, this is like one giant paper bag for them). The fact they can do the huddle-butt-pounce to each other (one cat inside, one in the peephole, one on the outside readying his attack) is SO MUCH FUN to watch, in a multiple cat household. Even a single-cat household, this would keep the lonely feller occupied for hours! I sprinkled catnip inside of it, just for fun, and also put a couple of their catnip toys inside. But they didn't need the nip; the tunnel is just dandy on it's own. A great deal for the price, well built (if this tunnel can stand up to 5 male cats, who have their claws and like to chew on things), it'll stand up to at least an F1 hurricane. A note: I saw some state the tie-strings were a problem for them (the cats chewed on them, etc.). If you don't need the tie-strings - if you won't be collapsing it for storage - cut them off. Really you can collapse the tunnel and put it into a shopping bag for storage, it's that easy. I didn't cut the strings off, I just tied them into pretty triple bows! =D