In reply to floss_81:
used an XGK for a decade then got a muka last winter. its much nicer to use, feeling less industrial, more controllable and safer - but it takes more pumping to get that. a lot more. and it costs more.
otherwise, it folds down way smaller (fits in a coffee cup) and burns super clean (no black shit on your gear). it doesnt have the range of fuels the XGK does, but it does use white fuel which isnt too hard to find if you not headed to tibet or siberia.
for that matter, ive used it down to about -20c and it doesnt miss a beat. i pair it with the pot off a reactor to get the flux thing happening.
i used a whisperlite for a while with a friend and the muka is similar in output, but still burns cleaner and negates true priming, so better if that matters (tent vestibule etc).
if youre into fine machinery and elegance of use then the muka may be worth the cash. if its just boiling water a week a year in a camp ground maybe not.