I've looked for well made, decently priced cat shelves for the last year. Each set I've come across is either to small for my chunky cats (less than 15\" long) and the largest cat being 13lbs, or doesn't include a ton of pieces (5 pcs. Max) Everything included in this kit is well made (holes all line up, wood is planed and sanded with no sharp spots), they even include a TON of extra hardware if you need it. They give you gloves, all of the tools required (two different sizes of Alan keys with handles, two types of wall anchors, tons of extra screws, and a small piece of sandpaper), as well as the carpeting for the steps and three small cozy pads for the kitties to sleep on. It has easy to follow instructions, and isn't too complex. I built everything by myself in 2 hours. I was hesitant to go for this set because of the lack of reviews & the cheap price, considering how much you get with it. But I'm SO glad I went for it. My cats LOVE their new jungle gym!