I'm loving my personal Li-Mn set up. In an E-maxx 2x 3s just flys! As for the safety issue, they are much safer because they are more tolerant to overcharging and being overdrawn. The main way Lipos blow is not from being over-discharged like everyone thinks, but from being over-charged. There is also a bit more voltage under load, which anyone can appreciate! I've been selling the Li-mns for a while now, and have had nothing but happy customers!