In reply to Chuckinpomgolia:
Have used one for almost a year and very impressed, especially with the ease during lowering with a thinner rope.
Two tips : always remove the Ohm on descent to make life easy for your partner if they are collecting quick draws as they climb as it is heavy to carry and fiddly to operate with one hand, remembering that the leader has prepared the Ohm before leaving the ground; clip in with a quick draw from the maillon to your harness as you do this as this can prevent 'assisted lowering' suddenly becoming 'full weight lowering' when the descending climber is relatively close to the floor.