My MKII is my fav of all my PVs. The size, feel in the hand, consistency of drags, and EXTENDED batt. are all reasons that this is my favorite.
If you get the MKII:
Make sure you get the batts made for the device. I wasted money on the bright orange ones from China. Also if you need an extra cap cover, they are available by purchasing an extra lanyard (comes with it even if they don't tell you it does - its in the pictures but not in the write-up about the product).
My list of PVs includes: MKII, SilverBullet, LittleSister Variable voltage, 3 wetboxes, all of the V4L batts old and new, 510 reg batts, eGo,
I have a feeling that the MKII may be "tied" with the LS...but I just got her so I don't know yet. I am now a E2 carto user and think/hope that the LS will be amazing with these cartos (from what I'm hearing and personally observing with the one day of experience I have with her).
Regardless...vape on!!