Like anything else, the very rare negative incidents with the use of these batteries get the most attention. I'm sure if you looked at the number of those in use compared to the number of incidents like Lipos catching fire you would find an incredibly small number. Generally, if you charge/use/discharge and store them properly along with the use of a balancing charger you should have zero issues. I use 2S 7.4V Lipo Rx batts in 4 of my planes, 2 with digital servos, and have never had a problem. I charge them at the field once and can then fly any one of them all day without going below safe voltage.