I got a length of Tachyon last summer, got a few climbs in on it, It was my first 11mm rope. I like it fine for DdRT, lighter than the XTC. It works just fine with HC cord, VT and hitch Climber. No problems.
I need a new rope for SRT, I would go with the fatter 11mm ropes, probably Vortex or Bluemoon. I think the Tachyon would be a bit skinny for the grip needed.
Oh yeah, it came with a small eye splice from TreeStuff.