OK, you nearly made me order the J118. Damn, yet another thing to spend my money! Seriously, nice and informative review. One question, though. Ive got some 801, 901/4075, 401, 510. I dismiss the 801 for its cold vapour, by far prefer the 510 for its performace, like the 901/4075 for its robustness and the 401 whistele for its simplicity, light draw and size (with smaller 402/3 batteries). For me, the main drawback of the 510 is the high amount of condensate built up, requiring constant draining, and fluid leakage. Im all willing to trade a -slightly- lower performence than the 510 for less condensate and less leakage. Question, therefore, did you experience any problem of leakage or fluid spill connected to the J118? And, about the J188 cart design, is this one piece or has it a separate fluid container (such as 801, RN4075)? Any problems with refilling and topping up or is it easy going? Thx.