I went to one and now a couple years in I'm working at one of the "big 4" companies. It worked out for me but I still wouldn't recommend them to other people. It only worked for me because it helped lay the groundwork but I put in countless hours every night studying and getting better while working as well. Too many of my former classmates graduated and expected that to be the end of the hard work, like they were no…
I also don't list my bootcamp anywhere mostly because I'm worried about assumptions people will make about my technical knowledge if I do (rather than judging based on my actual performance). I'm also hesitant to recommend it to others because while I have to say it was 100% worth it to me... I've tried to help too many people learn to code who just failed because they weren't willing to fight past the frustrations of the learning curve (which is very steep at first). I just assume now that most people don't have what it takes (and that is NOT intelligence or cleverness... it's mostly just discipline/work ethic/intellectual curiosity).. so I'll never really encourage people to follow my path.