i'm with Nat here. i have two frames 29er ebb frames, one bling ti bike and one of those fancy niner one9 frames.
being able to switch gears and not have an effect on st angle and the general cockpit set up seem like great advantages to me. lately, i have been switching out gear ratios more often and my knees have been starting to ache abit....maybe related to a change in st angle?
i have had a chance to hold a set of those paragon sliders, both in steel and in ti, and they are very nice. much beefier than what is on other frames i have see, like the voodoo dambala for one.
if builders like soulcraft, wily, solitude, desalvo and ground up (it's my understanding that this builder, Eric?, designed these) are using these dropouts, then they should be awesome.
also, i have heard that these add roughly 1/8 of a pound to overall frame weight.
i think i might be replacing both of my frames with a frame what uses the new paragon drops. i have been talking to desalvo and black sheep.