Not seen most of them before, but i have had experience dealing with mike herberts(321 guitar), i bought his slomo director software and recieved 6 fingerstyle videos plus tabs etc as a bonus, the quality of the videos was great, and easy to follow, and the slowdown software was exactly what i was looking for.
quick edit, if anyone wants to know about slomo, here's a link.
http://www.slomodirector.com/
