I recieved my 4s 6500 pack and it was much better than my gens ace packs, I wish I would have ordered 2 instead of just 1! I ended up running it all night & in the main. I didn't want to mix running the gens ace pack with the smc pack because the punch is much more with the smc pack & I would have to adjust my throttle finger input, so to stay consistent I just ran the smc pack. It ran flawlessly and I was extremely happy with it! Thanks again Danny!