It's good there are more options popping up. The biggest issue I see is that the prices for the MaxAmps packs on the CasterRacingUSA.com site are crackhead prices. Why on earth would someone spend ~$300 on 2 MaxAmps 2S packs when you can buy Trakpower or Enerland for far less?
http://casterracingusa.com/home.php?cat=39