I haven't seen much about Testmasters on here. Any feedback from those who used them?

I'm looking into GT course or the Testmasters. I've seen good things about the GT course but not much about Testmasters. Any feedback from those who took it? Thanks.

I took the in person Testmasters course in Houston this spring and passed the exam. Overall I would say the class got me about 60% of the way to passing. I also used the NCEES practice exam, CI practice exams,CI NEC Problems, the Electrical Engineer's Guide to Passing the Power PE by Graffeo, and Electrical Machines, Drives, and Power systems by Wildi to pass. The class got me into a good mind set for studying, but I do not think I would have passed from the class material alone.