OK had a little bit of use from the Brukit:
Took about 6 mins to boil a litre, not sure how fast that is compared to the jetboils, but quick enough fr me, it's fairly light but it's not night and day difference from my little coleman petrol stove which is much cheaper to run .
A 240 gram gas can will not pack into the pot, it sticks out about half an inch, not sure yet what the biggest can to fit is,perhaps 200 gram if such exists.
All in all pleased and the weight saving when camping out on the motorbike will be usefull, less usefull when I am travelling in my microlight (it's not that significant a weight saving and I have easy access to a fuel drain so this makes the old coleman a little more attractive)
Oh and it solves my problem of petrol smell as I use a stainless pot to both carry the coleman in and as a boil pot.