OTA has a lot of different types of classes: options, forex, equities trading, etc.
I took the equities trading 7 day class - Professional Trader I and II. The first time it was horrible. Didn't learn anything. May have written 1/2 page of notes over the entire 7 days! I had more knowledge from books than the instructor who may have been trading for a few years but hadn't taught himself anything!
I signed up for a retake and that experience was much better. The instructor was incredibly knowledgeable. I took about 30 pages of notes over the 7 days. If I do another retake, it'll cost me money but luckily I shouldn't need to after this instructor.
Bottom line: it is completely dependent on who the instructor is. Some are terrible, some are wonderful, most are medium. I talked with a lot of other students at an alumni event about their instructors. They concur with me.
It's a lot of money so think carefully. Read a few books first. The course is an odd mix of very basic information (what is bear/bull market) and technical tools (using Fib. for retracement).
OTA does offer a free 1/2 day to sell you on their courses. I think the free 1/2 day is worth your time. You get to know who is running the training center and how sincere they are.