Re: new Jems and Buzz Feiten
Having never tried a BFTS, my argument doesn't have much of a leg to stand on, but it's extremely annoying when I tune the guitar well for an open E and/or G and then try to play the open A, gagging on the horribly out-of-tune G and B strings. Anything that can make that even a bit better is worth a shot. Even though it's a couple of cents difference between any two strings, perhaps the sum total of altered tunings across all the strings makes a bigger difference.
Like most players, I do my own version of a piano's tempered tuning (the G and B a little sharp, low E a little flat) to find a decent middle road. I have to do this on any guitar I play, whether it's an acoustic or a floating bridge Ibanez. So even though all the variables of an Edge-equipped Ibanez add a whole lot of slop anyway, I'm guessing the BFTS reduces the amount of slop you're starting with, making life better. Right now it's a choice between perfect sounding chords in only certain positions, or making all positions slightly flawed, and I get really sick of the latter sometimes.
I hear the Washburn high-end models all come with Feiten, I'd like to get my hands on one and see how much better it really makes things.