Hi Greg,
My oldest packs this year are two TP 5000 G8's. I have attached screenshots of the logging app to show the capacity used per cycle and number of cycles (packs 5 and 6).
Setup is a Pletty Advance, I guess around 75A peak, maybe 80A.
These packs were new in April and flown almost exclusively to the WC. I used 5400's at the WC mostly, and then back to the 5000's since I got home.
Packs almost always charged at 20A, the odd time at 10A if I have a few packs going at once. Don't think I have ever charged them at 5A. I almost never leave them charged overnight, which I think is a big help to long life.
Just checked the IR's on them on the weekend and both packs all cells were between 1-3 mohms.
YMMV but the G8's have been working fantastic for me!