I bought this on it's phenomenal reviews. After spending an entire day getting killed and more or less transported back to the start minus the resources you've expended along the way I gave it up. I know some people love this kind of game, but not me.

Being a casual player and new to the genre, I personally find it extremely dificult, yet very addictive and rewarding at the same time. The feeling of accomplishment after surviving the brutal boss fights is like anything I have experience in previous games.