Price: $29.99
Battery Life: It takes around 3 hours to fully charge. With heavy usage it will last you around 6 hours.
Hit Strength: This device has an excellent throat hit and an impressive plume of vapor for a pen style vaporizer.
Adjustability: There are no settings to adjust wattage levels. There is just one button to activate the device. There is however an adjustable ring below the tank to control the airflow.
Durability: My first Subvod was black, and it quickly became scratched, leaving dozens of markings on it in a few days. I usually recommend to people that if you want to keep it looking neat, you should opt for the non-painted devices such as stainless steel. On my second Subvod, I broke two tanks. One while trying to switch the coil, and the other by dropping it. The tank is glass and there is nothing to protect it if dropped.
Leakage: Both Subvods that I owned had a fairly heavy and consistent leakage of e-liquid at the ring below the tank where the adjustable air-flow is located. Despite trying new seals, tanks and coils, I experienced this with both.
Overall: For $29.99 you get an excellent volume per hit. The battery life is definitely above average. The downside: There is persistent leakage with this device which ruins clothing and the battery is not built to last over the long term. On both devices that I owned the battery stopped charging at the 4 and 5 month mark respectively, and had to be tossed.