This is what has always concerned me. A lot of bootcamps are popping up making it hard to figure out which ones are legitimate. On top of that, as a military vet, I have worked hard to figure out how to get the G.I. Bill to be used with these bootcamps. Today, not many qualify because of a number of variables, but mostly include how the curriculum is dynamic.
Flatiron is one of the better orgs with a pretty good reputation. It's tough to read that they've fallen short for their students. It causes a lot of anxiety for those trying to utilize these schools to learn coding.