Yeah, I use them. Decent coverage. Pretty expensive. The idea was to pull money from a lot of doctors to form a corporation(Physician LP) and then purchase insurance plans (Aetna, BCBS, Cigna, etc.) as an entity, as most companies do. The goal was to create a cheaper and better insurance for 1099 doctors. In my case, the price and plan are similar to what I'd get in the open market.
It could be cost-saving for you, depending on your family dynamics and how much healthcare needs you have. I rarely use my insurance so I feel like I'm paying too much.