That pretty much sums it up. I used a set, two
batteries, for three months solid. Run time is really good, consistent with the 900 mAh, I tended to just use one battery a day since I use passthroughs at work and in the car, so each battery only ended up with like 45 charge cycles.
One early life failure, covered in the warranty period with no issue.
Slightly firm on the draw, again similar to other 808 auto
batteries.
Nice finish -- it's a rubbery black, good grip. A bit thicker than a standard 808, though slimmer than a Riva 510, again nice. Length in between a std and an XL 808.
All around good kit. Concerning cartos, only prefilled were available at the time I bought mine, and I'm into DIY, so while they ran a long time I switched to normal 808 blanks. Still have multiple of the G prefilled cartos. I really like NHaler's new Jumbo 2 ml, have bought several packs of the regular resistance (for passthrough) and LR (used on Riva with an adapter). I'd likely use the Jumbos on the G400; long and skinny, but a good vape and they are easy enough to clean and reuse.
After 3 mo I switched to a Riva 510, just to try them due to the really low pricing I found around the Holidays. I had to use 2 ohm cartos on the Riva to get G400 warmth, and overall found myself preferring LR 808 cartos with an adapter on the Riva.
I'm picking up a notcigs infinity VV now, with 808 connector, will be selling off the G400 (don't want to keep accumulating gear).