I was able to talk to some SWA PD people recently and the quote directly from them when asked this question was "our advice is to go where it is cheapest. A type rating is a type rating, and it costs a lot of money.."
By the way, I went to Aeroservice and had no problems with them. The only guy in my class of 6 who had trouble was a complete incompetent who was as F'd up as hogan's goat. He was sent home after his pre-oral and didn't even make it to the sims. (Sim money was refunded) The rest of us finished in 17 days, no extra times. It was over $1000 cheaper than HPA and included lodging. Well worth it in my book.