One word (or rather, one acronym):
BAMF (Bad @ss Mo-Fo)
I agree with Verdigris's post on the Companions thread, I have never felt this OP in a game. It says something that the majority of us are playing a TR right now.
Their survivability and mobility coupled with their insane DPS is just devastating. I can drop a boss in half the time of any of my other toons and with two dailies that are effectively AoEs there hasn't been anything I can't handle solo.
With everything I'm reading on the forums about the TR's performance in PVE and PVP I'm seriously looking for a nerf in the near future. Enjoy it while it lasts, I know I will.