Currently doing them. They are honestly quite refreshing compared to instanced story missions. I don't see them as repeatable dungeon type of content, but they are a cool way to flash out the terror Primordus is doing across Tyria.
They are short, instanced, soloable, scalable content (that can get quite repetitive) and they really suit the story. Sad they don't have more mechanics to them and mostly boil down to "rescue, kill, something random" and "escort" or "kill all enemies" and then the boss. They could've been a lot better, the fundamentals are there, but mechanics and diversity isn't IMHO.
Either way, they don't deserve to be as hated as they are. They are what Zhaitan fight was when game first came out, but better.