Would like to second this suggestion as Hunter has, and loves, the exact one in the picture. I have a full cat tree as well but place this next to the window to give Hunter a good vantage point and he uses it all the time. With his claws trimmed (actually took me a little while to pinpoint the source of the problem and I only realized what was going on the second time we trimmed them), however, he can have some trouble climbing it. Now that he's about four months, he can generally jump but before then I turned over a basket to make it easier for him. He'd still forget how to get down and get stuck sometimes, but it worked pretty well.Mine has the half-pipe on top, some of them have them on both levels. All my kitties love the half-pipe for some reason. They barely touch the circles or the hammocks.