I just got one but I have only played with it a little as I am still waiting on my B44. It appears to be very good. B-P-P.com has the best price on a combo with the balancer. I got mine from them & their service was good. A123 cells are lithium magnesium cells and are supposed to be very robust & safe but they do have a lower cell voltage and are not the normal Nimh or Li-po size.
-EMBX6,T8 1400, RX8, 5S Lipo ,Elite-RC, RCM tray
-EMBX6,T8 1350, RX8, 5S Lipo ,Elite-RC, RCM tray
-ROAR 4 cell rule Blows