It boils water, and it does it really well: fast and efficient. If that is what you need - this Jetboil is great. It allows you to make coffee or tea or prepare a dehydrated meal in a minutes (it's really 100 seconds for 0.5 liter). It is great for backpacking, camping or almost any other adventure where you need a hot water. (I'm actually taking it on a road trips). It works great on the wind. While it does not have "precision control", you still can manage to just warm something up or even make it simmer. Here were great points, now things that are not so great or at least require consider: - although the cup's volume is 1 liter, you can boil only 0.5 at a time (or at least the manual says so). While it's enough for a single person (and not a problem for two given a quick boiling time), I feel that saying that it is 1L actually is a false advertisement - the piezo ignitor sucks. On the wind it worked 3 times out of 10 for me. - unlike systems with wider cups, this one cannot fit a gas can. So eventually, the cooking system + gas takes more space in your backpack in comparison with wider systems (like MSR or Mo) Overall: I'm rather happy with the purchase. In most cases, this Java Flash satisfies my needs for hot coffee and preparing dehydrated meal. For something more sophisticated I would rather choose more sophisticated system.
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