I did a GA bootcamp, during which time we were all encouraged to blog about our experience on a weekly basis (and we did). I'm not sure where I'd necessarily write/post a proper review.
My GA review: I did GA coworking space before their pivot to full time bootcamp. Startups and an established community that had been there for years were all given one month notice at the end of the year and were kicked out... seats for learning are more profitable than desks for doing. Now all of the grads need jobs, which used to be across the hall. In summary, they're short sighted.