Well recently I've been stumbling on a LOT of guitar sites offering instant pro status... I already read the fret2fret thread and I was thinking that if anyone has bought any products from the following they could give me their experience and what the product was really like:

http://www.guitarcontrol.com/
http://www.playleadguitar.com/main.php
http://fret2fret.com/
http://www.fretmemory.com/

Do any of those products actually work?