I have never used a magdrive generator, so I can't say anything from personal experience. However, I do very clearly remember Bob Boyce stating that he has only met one person that has a magdrive and likes it. Also, you can go to youtube and do a search for "magdrive exposed".
It's just a video, but you might find it interesting.
I'm just getting into this fuel saving revolution; has anyone ever heard of this company? http://www.fuelfromh2o.com/ they sale mag drives. If anyone out there has ever hooked up an HHO system on a F150 truck could you please let me know how it went.
Have a good evening!