Elixirs on my TRB5 mate and the feltpick muffles em down a tad, compared to my normal Dava picks, not a huge difference in sound unless I hit the string with a big wedgeful rather than my normal, 'catch string with tip of pick' style. I also noticed a lot of fluff on the TRB's gorgeous green paintwork and wonder how long it will actually last. having said that, because of the size and shape of the thing compared to normal picks I reckon I could use all 3 corners therefore 3 times the usage.
Glad I got some though. never gonna know whats what unless you have a go!