Heliko, osterizer, I'm a very new pilot so this LiPo works great for me and those in a similar situation. I'm far from pushing the Axe in any respect. I'm just at the point where I'm getting comfortable with the tail-in hover, so I'm not pitching, rolling, or yawing very much at all. I'm also not throttling up more than 60 or 70% so I'll be working well within what this LiPo pack has to offer. I'm not hovering continuously for more than 5 or 6 minutes at a time so the pack is in the upper ranges of warm. For the moment I have the foam padding but am considering using a material that will disperse the heat better. As for the the motor, it is warmer still - slightly hot - despite having cut the slits in the main motor heat sink last week, following a tip from PilotLight.
So, until my next plateau, I think this E-Sky LiPo set is gonna be just fine. The performance is just right for my skill level and, at about $42, the price was right. Thanks Heliko and osterizer for your tips - I'll know who to come to when I'm shopping for my 15C LiPos.