I've had no issues with Apple TV, though I honestly expected some connectivity glitches. I'm not as media-hungry as some people though, I mainly watch Netflix and YouTube and listen to my iTunes library, though I do like exploring some of the free stuff on the Smithsonian Channel and Crunchyroll.
AirPlay is great for when I want to watch movie files from my iMac, but it does not mirror the DVD Player, unfortunately. I have to switch over to my blu-ray player, which is kind of a pain. But you can mirror VLC player, which plays DVD's too.