Cignot will send you prefilled carts at no additional charge, but I think the starter kit is empty. If you use VG juice, it has to be thinned out. I just had to thin my VG to 70% VG/ 30% PG to get it to wick properly, but once I did it was fine. Most juice is PG, so no problem. My VG also didn't work when I tried the mega, so you're prob OK there.
EDIT:
and I use the LR atty with menthol and toffee flavors, I haven't tried the standard resistance