
I too have recently purchased the Gravity Multi-Fuel. It's a state-of-the-art unit with little (in fact, with care) nothing to go wrong with it.
Simple to assemble and simple to operate, including a 'self-priming' system which I find far superior to MSR.
I bought mine from <actionoutdoors.co.uk> - Action Outdoors, 3 Great Colman Street Ipswich. IP4 2AA - a UK company who (for once) I am very happy to recommend, both for their technical assistance and performance.
Like John S-M I have not used it enough yet to present a review but I'm sure I will in the near future.
I Have the Gas version of the 'Gravity' and have found it to be an excellent stove but I need the verastility of having more then one type of fuel to power my stoves when out of the UK. The Gravity MF will uncoubtedly fill this niche, as it runs on white gas/Coleman fuel/unoleaded petrol as well as kerosene(parrafin).
I'm so far very please with he stove and more than pleased with the service of Action Outdoors.
Cheers, REC