What the members say.
The Jetboil is a metal, 1 litre travel mug with a dedicated propane stove that attaches to the bottom. The mug features a set of heat transfer fins and exhaust vents that, according to Jetboil, doubles the efficiency of the stove. To be honest I believe them. It boils water really fast. More efficiency means carrying less fuel which being in a canoe is not a great problem, but being a 'frugal' Yorkshireman it matters
One point I would like to make is to not make your drink and then boil it up as it gushes out of the cooker then an out of control volcano, just the water on its own, trust me, I know about this one.
The Jetboil is perfect for quick brew stops or even for use in the bottom of the boat. It is however limited for use of water boiling. Some dehydrated foods can be cooked in it although it becomes a real pain for keeping clean as the mug takes on the colour of the last meal. If 'proper' meal cooking is required stick with the usual MSR, but unless you want to be a campsite Gordon Ramsey or require the versatility of cooking with petrol, white gas, av-gas or liquidised sheep poo the jetboil is a lot easier and quicker. By the time the old whisper lite is set up and lit the jetboil
Jet Boil Personal Cooking System (PCS).  Review by Lee White
The Jetboil is modular, too. The propane canister and the stove, which features a built in  piezo-igniter, stack neatly inside the mug. The mug has a foam cosy with a strap handle, a simple cup top with drinking hole, and a bottom cover to protect the heat transfer fins.
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is packed away with you sitting drinking tea watching the others emulate an episode of Krypton Factor.
The Jetboil is a great piece of kit albeit with a limited set of applications. It is not compatible with standard pots and pans but if you feel flush the specialist frying pan can be purchased to broaden the stoves scope. Similarly the coffee press extends the range of applications slightly.
There are a few fuel options; Jetboil recommend the use of their own fuel, or the usual gas canister selection available in the UK, MSR propane/ butane mix proves to work well. If a small (225ml) canister is used this can be stowed in the cup and packed away as a complete unit.

The Jetboil is not cheap. A simple, single kit costs £60, but they are widely available and well worth the money. For more details see http://www.jetboil.com

Review by Lee White, originally submitted Here
İCanoe with a View and its contributors 2008 to 2009
"Highly recommnd bit of kit the best canisters I found are MSR 250ml on as these have a higher percentge of propane good for cold weather and use at altitude as it need less O2 to burn hotter thanks to the higher propane mix".

Gav. (Retro)
"Great bit of kit - Always take mine along with me in place of a flask".

Jon. (JT531)
"Fantastic piece of kit when in a rush.
I'm not convinced though as speed is the last thing I need when stopping for a brew".

Sean. (Jamatrad)