ok just my experience with TP packs.
i have 2 5200 50c packs, i have more than 30 charges on each of them, i always charge at 10AMP and never with a balancer (dont buy lipos from me)
and always run them untill the voltage cut-off stops me.
any issues??? not at all, do they perform good?? hell yeah, lap time is consistent from lap one till the end. are they puffed?? NO. do i treat them good, hell no but they still take my abuse with a smile eventhough i think the packs are sayin " what the F&*k is this guy doing to us"