I'm trying to decide if I should get a kit or just the mod by itself. How do ya'll like the Nitecore i2 charger that they send with their kits?
I bought the nitecore i2 on its own, it's really nice, i use it to charge my NCR18650's and the ultrafire 18350.
Both batteries bought at FT too, depending on your situation i feel that i should recommend the i4 because the price difference is too low and you get 2 more bays but remember that channels 1-3 and 2-4 have to charge the same type of batteries and share the charging. just a heads up

...and yeah, that pass-through looks like it could be very useful especially if you leave yourself in a jam with no charged batteries when you're out and about.