Different experience is most likely based on the amp draw of your application and the mah of the lipo you used. In my experience, the 2000-3000mah range ‘‘90c’’ nano tech could not handle the abuse of 30A constant draws nearly as well as the regular 30C lipos sold by HK (Rhino, Zippy). All nano techs died premature and were significantly hotter after use. Charge cycles were almost cut in half compared to the others.
Mind you, I never discharge below 3.7V.
4x heavy duty 5000mah, 12S total. So far, they are better than Zippy 8000 mah packs and are most certainly far superior to nano tech. My Trampa easily pulls 50A per motor when charging up hill full power.
Turnigy Graphene (excellent performance, good amount of charge cycles, good during winter)
Turnigy Nano Tech 90c (No good for what I own, amp draw too high)
Zippy Flightmax 8000 30C (OK, if you stick to 3.7V lowest discharge)
Turnigy Heavy Duty 5000 mah 60C (better than Flightmax, less sag and can go to 3.6V without heating up)
The Nano techs were also useless in drone applications. It is the lipo I started out with, but they kept dying.