FAA
Did mine at Flight Safety NYC couple of years ago, included with recurrent training, the instructor coach you all the time on the flight test, as you will be doing 3-5 hour test,instrument flying only, system failures and emergency procedures from engine startup to emergency evac when you land.
FSI has computers with mock exams by GLEIM, based on the actual exam you write, found that helped a lot more than the ASA literature, BUT the book you get with the ASA, you actually use in the exam...
I did the 121, in hindsight the 135 was a lot easier as far as W&B, EPR values etc was concerned.
K