Have they actually corrected all the incorrect answers on their feedback questions yet, or do they still look surprised when you point out that they have the wrong answer - as they have for the last four years...
The organisation is very poor, and is not a basis for setting out on a commercial career - other than it teaches you that you need to be self disciplined and motivated. The only exception I make to this is Mike Burton - if he is still taking the odd ground school then he really helped me and really knows his stuff. Sadly he was the exception.
As said before, I can't comment on other schools, but I would be very wary of handing my money over to CATS.