A buddy of mine went to SimCom for training and ended up doing his actual checkride in the airplane. He was happy.
One of the guys i fly with pretty regularly went to FSI way back in the day (back when the type counted for the 1900, too) and was happy.
The place I started out at as a CFI used Markette & Associates, but that was for 135 stuff. I'm not sure that he even does the 300/350 type anymore (or that he ever did...I just know they used him for 135 checkrides).
I know that isn't really that helpful, but...that's all I got.
-mini