I've been to Front Sight, and I have no complaints. They exceeded my expectations greatly. I found the instructors to be well qualified and extremely helpful. There is very little downtime, since there are supplemental lectures in between practice drills.
I do not feel that I was a victim of any fraud, but I still got the notice in the mail that was inviting me to join in the class action suit. I have not joined in that suit; I read over the allegations, and I find them to be frivolous at best. Having worked at a law firm, I've seen cases like this before. It happens to virtually any business entity. Cases like that are literally a dime a dozen.
I have a life membership at Front Sight, which will allow me to take virtually any course there at no cost. And I have absolutely no regrets about that decision (except for, of course, the fact that I don't live closer).
I have not been to Gunsite, but I do have a few of their training videos. If their facility is anything like their videos, then they offer excellent training as well.