I always thought it was the most interesting class because each power comes with a weakness, and they grow in power as you level up. Very X-Men like. Here's some curse examples for people who don't know what the class is about:

Clouded Vision - Your eyes are obscured, making it difficult for you to see. You cannot see anything beyond 30 feet, but you can see as if you had darkvision

Wrecker - The destructive power of the Abyss and its teeming hordes of demons seeps from your very pores and into your belongings and surroundings. Held objects gain the broken condition when you use or equip them but regain their actual condition if employed by anyone else. Disable Device becomes a class skill for you and you can make checks to destroy non-magical traps as a move action without the need to use tools or take any action beyond simply touching it.

It's one of the reasons I love Pathfinder more than DnD. So much variety and creativity in the classes. More reading