I've been playing this for most of the day! its pretty fun, I found my self losing 6 hours to it when it felt like 20 minuets.
My only problems are, the bartering system it feels odd to me how there is no coin involved, it felt like I had to give up all my scrolls of identify just to buy some armour or a better weapon and and selling items gave me nothing of real value like a single scrap of scroll or part of a gem, and the fact that killing so many zombies, monsters and "bad" guys, just felt pointless as most did not drop loot at all or any "money", where I did feel like I levelled up quite quickly but progression felt lack lustier as skills are passive and from I can tell you only get skills when you level up a certain number of levels. I was playing as a duellist and it was till level 6 that I gained any sort of "perk". I don't know about the other characters you can play as but I found the one I chose was a bit, for the lack of a better word, boring...
as a highlight, the game looks great (grimdark) and feels like Diablo but not to the point were you feel like your just playing some hack 'n' slash knock off. its loads of fun and I can really recommend it for people who are really craving a fix while waiting for D3.
It's sad though, as I can see a lot of the community on PoE (including my self) is going to leave the day Diablo is released, shame really because overall the game is pretty solid and fun from what I have played. I guess once I am done with Diablo I might come back to PoE.
Edit: Also how crazy is that passive skill tree, **** me I haven't seen some thing that big since FF10