This game is having a free weekend so anybody can try it out. It will be free to play upon release, but you can buy yourself into the closed beta.
Played it for a few hours now and I gotta say I'm impressed! At first it might not seem like much but when you start understanding the underlying systems you realize this is a very innovative game for this genre. It kinda borrows the materia linking system from Final Fantasy VII, which is pretty fucking awesome in a hack n slash. There is no "gold" currency. Most standard items are bought with "identify scrolls", but other items are bought with armor/weapon enhancement items. It sounds weird, but it's a really refreshing take on the hack n slash economy.
I might even enjoy this more than the Torchlight 2 beta, which IMO is far superior to D3 as well.
Can't say anything about the endgame, but they're planning on 4 chapters atleast.