Nope not hard at all....matter of fact I bet if I wanted to I can busted any WRX tranny in one fell try! It's more are you scared or not? If you aren't scared, then you can launch.
I'm using batlground because they can use open source. Perfectly happy with them. Even after they were done tuning they still tried their best to make sure everything was ok.
I have an 05 sti with a stock turbo and minor bolt on's like headers,tbe,short ram,plugs, and a fuel pump, and i took it to topspeed and had scott tune it and i made 300whp and 366wtq. And the car runs as smooth as glass im extremly happy so i say topspeed ftw!!