Right now I have a Sigelei it has VV and it works, its great. I can use 3 different types of batteries in it as it is a telescopic device.
Now having that said, I understand that you could 4 Sigelei's before I get to the $150 of a ProVari.
I see that there are many forums where you can read about A-Mod, B-Mod, and many other Mods (I will not mention brands). However, I like my devices to be handy, smaller is better, and reliable. I have seen a Provari in a water glass submerged and getting it out and still working, this is something that is Extreme testing, not something I would ever do. However, here in Florida the rain, and humidity is a daily thing, so I would think that having a sturdy device that doesn't let me down when I want to vape is something important.
Its just like having a wet pack of Analogs... pretty much useless right.
I see many against the Provari, many in favor, and I really liked all your points of view, but as some of you have pointed out its preferences, and that is what it comes down to I guess.
I started with a VMod and the little thing was nice in the hand and not too heavy, but and here is the issue I had with those, you put them in your pocket and go sit down and they break, juice in your pocket, pants ruined and nothing to vape with. The Sigelei that I got thanks to a Friend, got my into the Kayfun, after tasting the same juice that I was vaping with that tank. Now what a change,... I will never look back. Yes the Kayfun is hard to tweak and the micro coiling is tricky to say the least. I need a MOD that can help me tweaking my Kayfun. Ohms meter, Voltage output, and powering the coil. Now having that said, now you know why I ask the initial question, and wanted to see what others had in mind, or were thinking about one side or the other.
Thanks everyone for their input and feedback, you opened my point of view, and helped me getting my thoughts straight.