I thought my MyoXP sucked. Battery life was shit and the connections were flimsy. For the $80 it was, crap. Even at $55 now, not a bargain.
I'm much more pleased with my BD polar (detachable battery case that you can carry in your jacket or stick on the headband) or if I don't need long distance a Petzl Tikka XP (I'm looking for night skiing/biking or camp use not climbing)