While I can't speak for the original poster, I do have plenty of experience with my Reedy Lipos and my Zippy Lipos, among others. I have cars that I strictly race with and I have cars that I bash with, running everything from 13.5 to 7700s. I never had any problems with most of my more expensive packs, but the performance increases and durability factor have not proven themselves great enough in any circumstance to justify the cost. Considering that companies like Reedy support this great hobby the way that they do, I do not worry they will be hurt by a company like Zippy. Reedy will continue to win races, and people will continue to buy their products because of it. But someone like myself, I do not need a sponsored racer to tell me I can win local track races with a cheaper product.