Fabulous!
I got this for my 5 year old boy who, due to various house moves lately, has become an indoor cat due to no fault of his own. Also, my boyfriend has a dog so I thought it would be a safe haven for my kitty to escape to.
It was easy to put up and it fits lovely in the corner. It's tall, but it isn't wide, so it doesn't take up a huge amount of space. He isn't the bravest of cats but even he was up and about on it within the week, helped by me leaving treats on it so he was rewarded whenever he did brave it. Now a few weeks later he uses it for all the reasons I wanted to, and he particularly enjoys the scratch posts which he had a lot of beforehand. Never had a cat tree before but he soon got the hang of the jumping up and down.
It is a little steep so would be best next to a sofa or another surface your cat is allowed on so your they can jump from that to the middle ledges. Also, my cat hasn't braved the top top ledge yet (that I've seen anyway, but the treats have gone so he has been there at least once!), however I think he'd struggle to get down from this ledge...but he is a little overweight and, as I said before, not the bravest of cats is putting it nicely! So if you have a brave, outgoing cat, then you should be fine, and even if you don't, like me, then they'll also still get the use out of it you want them to!