I bought the black 100 watt. Its pretty solid. It works better then my sigelei. Feels solid. Better battery life. But it's an iSTick and It is not as popular. Those who own one know what I mean. The TFV4 tank Is my favorite. Wow, does that thing chuck vapor! The black version is very nice, If i bought a xcube it would be the black version. Looks a 100 percent better than the stainless.