I saw the mamba at the ATA show but didn't get a chance to shoot it. We had to catch the plane back and didn't get to spend as much time as I would like on the last day.
If you like short axle bows, here's my short list to check out.
Mathews Switchback Xt, Bowtech Tribute or Allegiance, and Hoyt Trykon.
All great bows.