Erica Jones uses one of these to great effect. I've owned both 3 and 4 finger models.
Good points - Beautiful smooth action. The hook auto resets. The hook, when at anchor, sits about 1/4" lower than other hinges like the Atension or Truball HT and BT Gold. This will give better sight marks if you are struggling.
Bad points - It feels to me as though the handle spreads the fingers more than other releases. The 3 crescent cams, I have sat all 3 side by side and the only difference I can discern is that the dots are in different places. Making fine adjustments to this release is a bitch because as you tighten the locking screw, the cam moves!