I started with the Innokin iTazte MVP2 11w and have/had 2. 11 watts is a tab limiting as I have grown. Their ability to "buck" is key for me since only they, the SVD that is also from Innokin, and the Provari did it at the time. It was a standard for Innokin. Smooth power up and down. Anyway, last fall, my wife wanted to start and so I made the two MVP2s available to her and I got a iStick 20w because Innokin hadn't released anything new yet. The iStick 20w came out rushed for the holiday gifting and Innokin was still trying to get the MVP 20w going. Being impatient, I got the iStick 20w. It was rushed to meet the holidays and it had issues. I tossed it after a month. The MVP 3.0 finally came and, yes, it is a tad heavier and bigger, but it is solid. I didn't see problems with any of the MVPs and even my old MVP2 11w are still doing fine with my wife. Anyway, just having an MVP 3.0 and a iStick in my hands I can feel the solidness of the MVPs. Just a history of quality.
I am happy with my 3.0s and don't really need to switch to the 3.0 Pro 60w. But, I bet it is a solid performer like all the previous.
Just me.