I'd tried fake cigs then garage-forecourt clearomisers and could see the potential but they didn't quite do it for me. A little research and some impulse buying led me to this great bit of kit.
Build quality is excellent. Capacity is obviously tiny which makes the stainless tank a bit of a head-scratcher, might be better including a couple more heads instead.
Spares are easily found online from replacement heads (in a wide range of resistances), coloured Pyrex tanks and airflow valves (in case you get a loose one like in the review, I have four and one was a bit loose, a replacement valve sorted that).
The genuine heads are good and respond well to cleaning with isopropyl alchohol and hot water but the virtualvape unicoil rewickable upgrades are a huge step up. I've heard good things about the nature vape upgrades, too.
The supplied drip tips are great but a bit small and the rounded top kind of breaks the straight-edged design. A wide stainless/Pyrex mega tip looks great on this.
Because I like to switch between juices during the day I have four of these on ego c-twist batteries for the working day. Can't fault them.