I'm sure this has been hacked around here a lot, but I'm a newbie and I'm after some simple explanations. I'm very much an MTL vaper and I'm not into cloud chasing or experimenting. Noe's list suggests buying PG only juices (mainly) and Heavengifts seems to sell mainly PG only or VG only or 70/30. Some other sites mainly sell 50/50. So what are the pros & cons of using only PG or only VG in my situation? Or varying the mix for that matter?