I've made my way through about 90ml of RSV to date, about 80ml of which has been their menthol flavor I've touted on many threads. The vapor production is reduced compared to other vendors, regardless of the PG/VG ratio. When I compare RSV's Menthol to VaporCastStore's Pro-Thol, the Pro-Thol creates almost twice the vapor. However, if you like the RSV flavor and don't mind reduced vapor, there's no other issues with some of their flavors, as far as I'm concerned. They have the best ice glacier menthol on the market, but when I want a more complex flavor, with much more vapor, I head for the Pro-Thol.
As for their flavors... their green apple is good, cotton candy is good, hot cinnamon played havoc with my heart, and their Cola was too flowery for me. But their menthol... Mmmm.
It is also worth noting... I've experienced on several occasions virtually NO vapor, but after about 30 puffs, the vapor seems to increase to more normal levels. On another occasion I got virtually no vapor out of it after prolonged use in a Resurrector cartomizer. I think either the carto was defective, or I flooded the heck out of it as a newbie to carto's.

lolz All is good now though.