I have a few Aspire ET-S BDC glassomizers and i have to say i love them. I have a Pro Tank 2 and did not like it at all. It was to airy for me, and i kept getting a nasty burnt taste from it. I changed the head a few times, and it kept happening. Because of this, i did NOT want to sink more money into the ProTanks. I would try the 3, but havent yet. Anyway, i got my Aspires from myfreedomsmokes.com and these are better looking (in my opinion) than the vivi-nova-looking ones. I really really really like them!! I did buy a set of heads when i bought the tanks and they were not to expensive (around $10 for 5 heads). have found some good threads on here about cleaning them to extend the life of the heads. The only things that i have noticed is for some reason when the liquid is getting pretty low in the tank, it will flood. This has only happened to me a few times in a couple weeks but every time it has happened, the tanks has been low. I also really like that it produces a warmer vape than some of my other tanks. I assume this is due to the dual coils. All in all,if your on the fence about trying one, i would recommend it. They are not as expensive as other glass tanks on the market so it is less of a risk... not everyone likes the same things though so what i really enjoy you might hate... just my thoughts on the Aspire ET-S