KingHeadz or Losi shoes for me too. The Max-lifes didn't last more than two weekends for me. I started with all silvers and found out quickly they wouldn't fully engage. But I wasn't using a high horsepower engine either. I put the black/green springs on and gold/black for the truggy. So on my 8T, 8, and dirt oval car the Max's were finished (22.9mm across) after two weekends.
This is only my experience though. Another friend at the track really likes the Max-Life shoes.