It's super sturdy, the build quality is top notch.
I have 2 concerns:
1. The scratch pillars aren't bolted straight it doesn't effect the strength it just looks a bit off
2.the balls that the cats catch are super easy to get ripped off by cats and they're determination.
3.i think it best that one of the houses has only one opening not 2. So he can use it as a hiding spot
4.bolting the shelf was a bit tricky i knew how to do but it took me time.( I ordered that the house be left outside because I wasn't home but it would be nice to include a manual during shipping or on the website.
Don't get me wrong it's better than I thought I would give it the 5 stars if these things got fixed. It's hugggggeeeeee and me and kalfoot love it dearly.
