They are well built and sturdy, but lean a bit and aren't level. They aren't off enough for flat items like a plate or cup to slide, but are visibly slighted slanted, which is disappointed. They do the trick though as far as giving a spot to sit your popcorn and other snacks during movie night, and you don't have to worry about it wobbling or dropping. I really notice the crookedness when I use it as a laptop tray however. I have three for my sofa and only two are crooked, so you may be taking a gamble when purchasing. The swivel is fluid and a nice feature. They do have to be turned facing outward for you to access a drink from the cup holder on the sofa, which I also see as a design flaw. Overall, they work effectively, but slightly disappointed considering the high cost of these accessories.