I have two NiteCore i4 V2 chargers, and (just recently) picked up an XTAR VP2. No complaints with the i4s, other than the somewhat stiff spring clips, and the fact that they don't always comfortably accommodate the sometimes larger protected 18650 batteries (lengthwise). I mainly bought the VP2 because I wanted something that could also charge LiFePO4 batteries (which I am now using in all most of my CR123 lights, in place of the dreaded primaries), and so I could easily charge 26650 batteries, as well. The VP2 is amazing. I'm loving the select-able charge rate, the metering, and the super smooth feel of the spring clips. I use all three chargers simultaneously, when I'm doing a 18650 run of charging, so I'm able to charge ten batteries at a time (very handy - really speeds things up). How are you folks' experiences with the new VP2 charger? Now, they just need to come up with a VP4, or a VP 8, to charge 4, or 8 batteries, simultaneously Edit - I just took some Nyogel 760G lubricant (which I use for all my flashlight threading) and applied some to a cotton swab, running that along the spring clip channels, and now the spring action on the i4 chargers is even smoother than the nearly brand-new VP2. Wow! That was my main pet peeve about the i4 chargers (aside from not easily fitting some of the longer 18650 protected batteries). Now - smoothness problem, solved. I still love my VP2, though .