I've been reading about the Pro Trak at their site and I think it's bleeding edge. The CDAT program can help you determine what charging methods are beneficial for each pack. Every pack is different in my opinion. Remember you want to provide the best charging scheme to optimize the chemical reaction in the cells. What interests me are the charging methods - the multi phasic ones. This is a cool feature because you can use CDAT to find out if the cells need a different way to charge as they get older in order to "wake" them up. This will definately help you use those packs to all of its potential. Good luck on your decision.