I actually really like them. There are a bunch of rotten examples but some of my favorites are As above so below, the taking of Deborah Logan, and Hell house LLC. I'm actually not a fan of Blair Witch, which I think is what most people base their judgment of found footage on.

This is honestly one of my favorite movies. It's depiction of the time period, coal mining life and community, and to rise above your surroundings are all excellently done.