Never seen or heard of them. Most of the track stuff around is fairly high end (ie. record, dura ace) or old stuff. Some of the guys use Miche or suntour which are both excellent budget options and i would imagine the truvativ are along the same lines as these. Just check what size bolt pattern (pcd/bcd) they are before you go and buy chainrings as they may not be standard (5bolt 144mm) i know that Miche are not. Basically you can't go wrong with track stuff, and from a brand name such a s truvativ im sure you will be ok. I personally run FSA's new track cranks with a solid carbon spider and so far would not recommend them. They have play in them that is currently being rectified by the LBS (hopefully) if not then i will be on the lookout for a set of Shimano Dura-ace i think.