I have a couple of bootcamp grads who are good. Thing is, I’m 99% sure they’d have been good without the bootcamp time as well.*
Overall, I’ve had a terrible experience with the bootcamp “mills” that cram people though dozens in a batch and where all of them have some bullshit story about how they did customer interviews and then built an inventory manager or CRM or e-commerce site for this (made-up) business. The story rhymes with a story that would be relevant but it’s 100% veneer with no backer.
They’ll have a GitHub link on their resume. On it, you can see the same code as 5 other applicants. All the green days are clustered together and all stop abruptly at the same time as each other.
Those candidates are what a lot of people think of when they think bootcamp.
tl;dr: bad bootcamps are bad. I don't think I've ever crossed paths with a Lambda School/BloomTech grad to have an opinion on their program.
* this is the type of bootcamp experience that reads to me like the rare positive exception: https://news.ycombinator.com/item?id=33826116