Hi Top Cookie, I mainly use an early model GGTS with either LR Dual coils or LR Boge Cartomisers. Occasionally like to go back to dripping on an LR901 attie though 
Yes, seen some very amazing changes
When I bought my first e-cig, here in the UK there was really only a choice of 3 models, a super-mini, mini & pen style. You couldn't even get e-liquid here, only prefilled cartridges.
Yes, seen some very amazing changes