i know people are turned off from the 2ml but imho its totally worth it!! this tank makes the gt4s even smaller! its great! it looks so dainty but yet still looks so mean! its beautiful! i love smokerstores products! not to mention the gt4s XS tank fixes ALOT of the gt4s problems! idk why! but i have less problems with this then the full gt4s tank. the juice flow control works better and the top cap comes off easier with out accidently unscrewing the chimney!