Here's a nice UNSPONSORED look at it from a long time Diablo player turned PoE player.
It's a bit long so if you're just looking for a should you buy, he basically says "if you already wanted it like me you already bought, if you're on the fence maybe wait a week or two to see how the company handles it, it's a small company like how GGG started and they have a good base so we'll see where it goes"