This was the first year I was prime and could take advantage of prime day. I was very disappointed. The few things I wanted sold out in minutes or even seconds. Gift cards, in particular, sell out in less than one second. I think I bought one kitchen thermometer that wasn't really even that cheap, but I needed one and it was reasonable.
Most of the stuff seemed to be crap that they wanted to get rid of. I browsed several categories, and it was just such random crap that I'd never buy. Why don't they just call it "prime clearance" since that's mostly what it is, plus a few decent items that sell out in short order.
I actually had several things I wanted to get (bed sheets, some electronic devices, household goods, etc.), but couldn't get any on prime day. Either nothing on sale or they sold out too fast. Pretty lame.