Only for a young cat...
920109
Pretty. Easy to assemble. Adjustable. Not too unstable. Most suitable for a young cat. Ours is 7. The planks weren't long enough for him. He isn't scared of much. Felt VERY nervous - even after treat training. A great starter tree for kiddo-kitties tho.
1191076
It's nice but not made for a cat older than 4 months. My barely 4 month old kitten looks like he's about to tip the whole thing over. The mouse came off at the first tug.
724259
kitty doesn't pay much attention to it. Granted he has a much larger tree that he hangs out in. Bought this one so our nearly one-year old would have an additional scratching post as he still occasionally was scratching on the furniture. He's hopped in the top compartment a few times, but mostly just walks on past it.
2310510
This thing is really hyped up in the description. In reality, it's just a dual track toy with a hole in the middle, where they tell you to drop some catnip. As with many cat toys, the construction is really flimsy and you cat may be able to rip out the blue ring as it's not securely fastened, and actually fell off.

I got two of these, both cats play with them approximately once in a blue moon, so they might be better for a kitten rather than a mature cat.
3496205
The cat is a lot smaller than it is pictured here !
It's not plush.  It is hard and cheap !
Total bummer ....
854344
It's pretty tiny, our cat was only 8lbs when we bought this and she barely fit on the bench part. It's very short tool. The twine on the back scratch posts started to unravel in less than a week's time and both the dangling toys fell off in the first day. The tunnel at the top is VERY wobbly when the cat jumps on top! We ended up buying a bigger, fancier cat tree... however, our cat will only use this one. So as the human who pays for these things, it wasn't worth my money, but I guess it was good enough for the cat.
3621312
I'm giving it 3 stars because my brother's cat LOVES hers.  After watching her enthusiastic interaction with her BOLT I rushed home and bought one for our hefty one year old cat.  And he completely ignores it.  I didn't think to return it before the month was up, kept hoping he would learn to enjoy it but no.  I guess I'll have to count on the cat getting his exercise from running away from the dog.
1008878
The first one shipped didn't move at all, so Amazon (easy return process!) send another. This one moved, but the slow speed was way too fast for this to be an adequate toy for a cat. They couldn't successfully chase the light, and were more interested in the unit itself, partly because of all the noise it made. It seems very likely that a pet will end up staring into a laser, or toppling the thing over (the base isn't weighted). I think a ball of yarn is a better alternative to this one.
1724210
Lots of pieces to put together & it took me 3 hours to assemble with my feline assistants.
My cats/kittens about 8# in weight each and 7 months old and the platforms are too small for them.
If you have a small slender cat, this would be a good gym for that kind of cat. It's not for larger cats. Mine don't want to climb to the top
barrel as it is hard to get in and out of for them. The sling is also at an awkward place for them to get in and out of. It would've been a better design to have the sisal on the lower posts so they could scratch them from the floor. Definitely for small kittens or slinky slender climbers.
2105995
The materials and the construction is good, but it's not realy a cat tree, it's a kitten tree. Every part of it is so small that it's unusable for a grown cat. My cat can only use the 3rd level and the top part, which he loves. The first and the second levels with all the details he doesn't even try - they are too small and uncomfortable for him. And he's an everage size cat, not big.
2412261
I had such high hopes for this product for my indoor-only kitty, especially since our place is quite small...it really seems like a great way for them to wear off their energy, but unfortunately no matter what I tried (treats, toys, catnip, etc...) my cat was just not interested in using it.
4015469
My cat does like it however it's TINY. I didn't expect it to be so small :( and now that we built it , she won't get off but the whole point of the new cat house was to give her more space . This product is for kitties under 3 years old mines barely 4
2907687
Construction is good. Its easy to assemble.

This is for smaller cats. The bottom, and cave can be used by any cat but the middle tunnel and top bed are really small. And on top of that, the platform that they sit on is just too small. Its rare that I even see my cats up there since it is so difficult for any cat to get up there. They hate it and I think it was a waste of money.

Do your research and measure. This is for small cats.
3188042
I've got a 4-yr old cat who is most intrigued by the tail feathers on one item.  She's a bit intimidated by the furry item on the spring because it bounces.  She ignores the ball with a bell in it.  I think this item is more meant for a young cat or kitten.
2424434
We ordered this for our tabby cat, who weighs about 20 lbs and found that it was much too small. Granted, Meow Meow is large for a cat, but this was advertised to fit a medium sized dog. The neck could barely be made to snap, which concerned me for any animal larger than a chihuahua. The leg openings are very high, which allows for little flexibility. The belly snaps wouldn't come anywhere close to closing, but that is the only part I'll blame on our fat cat.
4388287
I attached this to a wooden windowsill and the 2 wood screws they give you for holding it to the sill were not at all adequate. I had to pound in many of my own nails to hold it on for a 15 lb. cat.  The white things at the bottom do not provide much support...they are almost just there for show.  This says "double kittly" shelf but if you think that means 2 cats they better be pretty small.  On the upside the padding and cover are very comfortable...my cat spends half his life on this thing watching squirrels and even sleeping on it...he loves it (but then he could care less about nails in the windowsill).
3542220
cat rarely plays with it. Had to remove the top plastic enclosure so the cat can move the ball. Probably was meant for kittens only.