I have used every brand of electric filet knife on the market and like the new rapalas the best. The main problem with them is they burn up if you use them for more than 20 minutes. I go through about 6 of these knives per year. When one starts getting a bit warm, I just switch to another.
Next best would be the american angler, followed by the mister twister and the pirhanna. The mister twister lasts the longest, but the blades are big and bulky.

Kens method does indeed save the most meat, but is too time consuming to filet lots of fish.
I take the meat off the bones by starting at the head, cut right thru the rib cage, and then have my partner take the rib cage out and take the skin off with a rapala hand knife.