The effects that he teaches are good and his trick are also good however when it comes to teaching he goes over thing rather fast. Sometimes his hands hide what you are supposed to do slightly. and with a few sleights he actually misdirects the learner a little by pointing to something then doing another thing almost immediately.
Also his style is different from my style so I didn't really like the dvd's however they are still good.
I would suggest looking him up on youtube before purchesing because his style might be different from yours too.
if you like his style defintely a good deal.
Alan Ackerman 3 Volume Set - DVD