I love flat pack but by the time I’d finished building this I swore it would last them their life times and any more I had because I was never doing it again. It would have been easier as a two person build. In the reviews some said that it was good for adult cats, both mine are adults but one is a big cat and it’s a bit of a squeeze for him so if you’re looking for adult cats maybe go for one a bit bigger. Other than that it’s good, does what you’d expect it to do. Does wobble a bit but think I might need to tighten things up a bit better but it’s difficult with an Allen key.