This. I've had my iPV3 for about 2.5 months. It's completely transformed my vaping habits. I almost never use my Kayfuns, pretty much drip all the time. I never dripped before. I've settled on dual coil builds between .4 and .65, vaping between 40-55 watts. I knew I didn't need even 100 watts, just wanted the dual batteries. I didn't realize how much it would impact my vaping and make me barely use my mechs, so now I want a single 18650 device, I like the iPV mini 2, so I can keep my batteries in rotation. I force myself to use my mechs a bit, just so I don't have like 13 perfectly good batteries sitting idle.
I understand 50-60 watts, it's a nice warm vape, 165... one pull of a 1 second and you're dry. I'm now finding myself interested in temperature control, it will be interesting to see if the iPV4 has it. I wish the Smok 80 watt didn't have built in batteries, aside from that it is what it want next. VaporDNA has them for $59.99, I have a $10 off coupon, add $3 bucks of nickel wire, and I've got an 80 watt temperature controlled device for about $53 shipped. If it just used an 18650, I'd probably have one ordered already.
I'm excited for more 60-100 watt boxes to come out, hopefully with temp control just to see what it's all about. I think there are good things coming this year, they already are, in fact.