Took about an hour and a half to build if you’ve got power tools, the directions were all pictures, some of the steps were TINY so you have to look closely at the pictures to make sure you didn’t miss anything. But most importantly, it works. It’s way heavier than I was anticipating, so it’s sturdy and not going anywhere, and it’s large and has ample space to put decor or other items on top without blocking access to get inside for either cat or human. The cat took to it pretty quickly, she hides out in the middle part where the scratching pad goes, and most importantly, it keeps my dog OUT. She was curious at first but like I said, this thing is BIG so my cat, her food, and litter box are out of reach. Highly recommend.