I’ve been researching cat enclosures for about 6 months and I decided to purchase this particular item. It was relatively easy to put together, but did take 2 of us about 4 1/2 hours.( We did not have a power drill!) All parts & hardware were included and it was delivered in a timely manner. The stability is good but I wouldn’t say it is extremely sturdy, but definitely worth it for the cost (bought it on sale)! So far our 2 kitties seem to enjoy it