I bought this cat tree as an upgrade from a smaller one for my 14.5 pound cat, which he had outgrown. When I buy things from Amazon, I always read the negative reviews first and if they don't put me off, I move to the positive. I have to say I think the negative reviews for this cat tree have unreasonable expectations. I think this cat tree is amazing, and as you can see in the photos, so does my cat - and that's what matters. I would point out that the pictures online indicate a bright true blue, and I would argue it's more of a soft slate blue. Luckily, I find that I prefer this colour, though it's something to keep in mind. I don't know if it would be suitable for multiple cat homes? But I suspect two cats would share this cat tree just fine. Especially if one was smaller in size. Pros: Fun toys that are durable: My cat plays with the various different toys (which include a twine rope, a mouse hanging from the one house, one hanging bauble and one spring coiled bauble, and what they call a "Cat IQ Busy box" that has two balls inside). While some reviews said the mouse came loose immediately, my cat has played aggressively with it and it is still here, so far so good - but we haven't had the tree for very long. Lots of different levels: He loves everything from top to bottom. Lots of twine: part of why he loves the different levels is that there is a twine pole on every level and he loves scratching this. One negative review said that it wasn't made of the normal carpeting that they could scratch? While the main unit is a soft plush carpet, this is exactly as it was with my previous cat tree. However, the twine poles are more than sufficient to happily scratch away at. Good size: It is true that the top two levels are small, but as you can see, my 14.5 pound cat can comfortably sit and even lay down on those levels. I doubt he'd sleep there, but he fits nicely into the larger compartment down below, for this purpose. The middle level compartment is more for play and hiding than anything else. He is not cautious or wavering in his use of the top two posts. Pro and Con: I would say that this cat tree is actually quite sturdy, as cat trees go. The assembly used a good number of large bolts to adhere everything together. However, I think the nature of cat trees is that there is a tiny bit of wobble to them. It's nothing unstable! But there's a bit of movement when he goes up and down. I will point out that he doesn't seem to care at all. This might be more important to multi-cat households. However, the base was surprisingly hefty, so I do not worry about a topple over. Con: The one clear negative that I would give about this cat tree is that the instructions were a bit of a mess. They weren't always correct (diagram indicated correct screw to use, but written instructions indicated incorrect screw) and sometimes they weren't in order (the middle compartment should be placed to attach to the middle level using the same screw that attaches the middle level to the centre post below it, it should not be placed after the middle level has already been secured to that post). Sometimes, I would argue, they didn't suggest the best option for assembly (the little ladder has fairly malleable, though sturdy, attachments, that I connected to the tree from the underside of the middle platform, rather than according to the instructions, which said I should join them at the top of the middle platform, where it would be an eye sore and also get in my cats way). HOWEVER, frankly, it's a fairly basic construction, the visual diagram is quite helpful, and I had this thing assembled in full, including photo breaks of my cat climbing, within thirty minutes to an hour of opening the box.
