Over the life of the batt they are cheaper, you get a more constitant flightand higher head speeds due to a flatter, higher discharge curve compared to regular lipos. Faster charge. Now practical to charge in the field if you have an inverter. Can be charged at 5c. A 2200mah can be charged in about 15 minutes.
Biggest problem is going to be getting them. They were only released on 1st Apr so demand is higher than supply. Won't be long and everyone will have a version of it out there.