Hi all! Glad to have found Vaping Underground. Reminds me of Velvet Underground. My vaping has saved my life and changed my health status in every positive way imaginable! I have been having fun with my newest ProVari P3 Celtic Knot. I know knot where to begin expressing my joy at having this unit! My husband ordered it for me and I was not expecting it. I kinda hinted I wanted the Knot on my fifth vapaversary -- so he really blew me away! I am having so much fun with it! I have several 510 batteries but nothing comes close to this. I'm overwhelmed. I am grateful to have used PVs as a way to completely get off analogs. It feels so good to be able to breathe freely again! Hope to learn all I can here and again, very pleased to have found you!!!