This might be a bit late after the initial posting, but I just got my JetBoil and I really like it.

The time it takes to boil water is insanely short. Granted it only works for water and it'll undo/redo some people's notion of cooking out in the woods.

Retail is $75 and it's a wee bit on the expensive side if you do a comparision of a) how much water per fuel it can boil (approx. 11.5 liters) and b) how verstile it is (not very, but if you look at Jetboil's website they do have alternative recipes for it).

On the flip side you've got those prepared dehydrated foods that require hot/boiling water to rehydrate/cook. This would be an excellent use of Jetboil.

As for the question regarding fuel, it can run on non-Jetboil fuel but the performace is about equal or nearly so. At least with Prima fuel.

While it's not as light nor as verstile as say a MSR whisperlite, it's great if you go for a easily stored cooking device. As for mentioned, the fuel and the burner can go inside the cup.

Cheers!