well i did dallas, and i did umat (obviously) and the only thing that was good about his course in my opinion was superkeeneye. and that didnt end up helping all that much, coz the stupid sequence questions took over this year. with superkeeneye i think u just gotta practice
and for section 1 and 2, i got all the questions wrong at the dallas prep course thing, so i was like bummer im gunna suck, and i made up my mind to just answer the questions my way, with my own common sense, ie not using his stupid procedures. and i ended up with 96 and 95 percentiles in section 1 and 2. so his ways are crap in my opinion.
but maybe he's good for other people.. i dont know