There is very good feedback on the net on the Bob Beck Braintuner available from Sota Instruments. Bob Beck stated that the Braintuner, which he developed, is partucularly useful in eliminating: anxiety, depression, poor memory, isnomnia and drug and alcohol additctions. You might want to check it out.
I have been using the BT on general principles for about 6 weeks for 20 minutes a day, the recommended amount of time. The difference I noticed is that I remember my dreams now-a-days. I didn't have any of the above problems.
Somebody at curezone said that she bought a BT years ago, but that she doesn't use it anymore because it has stopped her drinking addiction! It worked for her.