zippy are better than true RC. I have two sets 2S+3S 8Ah truerc and the first one is loosing balance extremely fast looks like some cells are bad (but it can be ballanced in like a day, fully charged and I can get 8AH out of them)
I preffer zippy packs.
Radek
V4 D8 - RX8, XERUN 4168SD
F1-09 - Tekin RS Pro, 17.5t Redline, 2S LiPo
Sakura Zero S - LRP, Saturn 20T, 2S LiPo
*EX-10 Eurus*