I have been highly impressed and surprised by these (not necessarily in this order)...
1. The Eleaf iStick TC60W Kit. It's a great TC Device that is very rugged and can take fall from a good height onto a hard surface. The included Lemo RTA is very nice as well. Overall, a great Kit.
2. Vaporesso cCells in the Target 75VTC Starter Kit. These Ceramic Coil Heads give amazingly great flavor. The Target Mod is quite efficient with a single 18650. Overall, another great Kit.
3. The Reuleaux DNA200 with three 18650s. I think it's the best TC/Standard Device out there, but charging via USB is what surprises me. It has been said repeatedly that charging via USB would take a very long time, but it really doesn't take longer than other devices with one and two 18650s. Since all three batteries are in Series with a great Balancer, they all basically get the same current and seem to charge just as fast as a single 18650 device. However, when I charge my 18650s externally, I charge at 0.5 Amps to extend battery life, so anyone who charges at 1 and 2 Amps may not be impressed.
4. The SubTank Mini (the STM). I love the RBA. It is very easy to build and works great with both Kanthal and TC Wires. It is my All-Day Go-To Tank (on the Eleaf iStick TC60W). I wish I could find another STM in Stainless today!!!
Thanks for the contest, Mike and MadVapes.