The Tenergy is not a bad charger, it works. Provape includes the Tenergy TN270 charger in their bundle deal, that's where I got mine.
I have since dove into Mech Mods and purchased 4 new AW IMR 18650 1600mah batteries. I'm a lot more cautious on my battery charging habits and battery voltage now that I'm sub-ohm vaping. So I decided to go with the Pila charger. So far it is great, consistent charging, and looks nice. Time will tell if my batteries will last longer with this charger. I would recommend the Pila but if your on a budget just make sure to use a multimeter to check the batteries off the Tenergy charger to make sure it is not overcharging them.
(I did notice one channel on my Tenergy was over charging a little.. to about 4.25)