Stevewrote a review of MSR DragonFly Stove on October 21, 2013
Familiarity: I've used it several times
Just went camping with my stove that hadn't been used for two years, and before that it'd only been used a few times over the 7 years I've had it.
Make sure you take the spare o-rings and lube with you when you go away. My pump had three dried out o-rings, and wouldnt work. I'd forgotten to take my annual maintenance or expedition service kit with me, so couldnt use the stove (I had a pocket rocket as back up anyway).
So if you buy the stove, but the expedition service kit too. You don't need to take the whole kit with you, but a few o-rings and the little tool are worth having .