Not sure how much I've spent but I will have a Provari soon.  I sit at my desk all day and have a KGO, Ego-T, and and a twist.  I go between the three and I have to charge two of them by late afternoon.  I like the twist but if I vape around 4.0 I'm charging it constantly.
From what I've seen and read here nothing can touch it the Provari.  With what I spend replacing these batteries verses an 18650 maybe the savings will make the purchase pain better.  I like a few things about it...great consistent vaping, many safety features(I like that a lot) and, in other peoples words, built like a tank.
Every time I think I've found a 'as good mod' there's always the fine print.  Why screw around?
BTW, the ego's and kgo's are great units but if I can scrounge up the cash for the Provari, I doubt that I'll regret it.