Son has done it the last 2 years and is looking forward to it again this summer. He has been to Canada, Kansas, and will be in North Carolina next summer.
The team will set it up for you. I've heard great things, and I've heard horror stories.
Great things usually come from great organizations, and the bad things usually come from those orgs that struggle. Not to hard to figure it out, but it makes summer more fun with a good host family.
Year 1 he had a couple of teammates with him and had a wonderful lady who cooked for them every evening and let them ride 4 wheelers, hunt, etc on their farm. Last year he had a wonderful family and while they didn't cook much for him they gave him food gift cards galore, and he became close with their 3 year old twins.
At both places he had rules (curfew, expectations, etc) that were set by the organization. Both coaches stressed that you were representing yourself, your parents, your school, your college coach, the summer team, and the summer coach----so don't mess it up.
He is still in contact with both families.