I have posted a review of the JetBoil System. My first backpacking stove was a Sterno Stove before there were backpacking stoves. Yes I am ancient, but I was born at the perfect time to experience the full evolution of backpacking. For example:

• My first hiking boots were not made for hiking and to get them waterproof we used neatsfoot oil. I became a big fan of snowseal when it came along.
• My first backpack had an aluminum frame and canvas bag with no hipbelt, and the shoulder straps were not padded. (My first enhancement was to add pads on the shoulder straps. Then I got a pack with a padded hip belt and I thought I could carry twice as much.)
• My first tent was a single wall unbreathable nylon tent from Camel. I always had condensation inside the tent.
  
• I was a charter subscriber to Backpacker Magazine and was so happy that they were getting the word out about trails, the latest equipment, and trail etiquette.
  

OK, this is supposed to be about stoves. My first gas stove was an Optimus 80 in 1972 when everybody seemed to have the Svea 123. Later I bought the original MSR model GK and when that was stolen I replaced it with an MSR Whisperjet. I still have the Optimus and the later MSR, and they still work fine, but none of those gasoline stoves had the flame control that is available with the propane and butane models. Starting the gasoline stoves involves getting some gas in the "spill cup" to burn and heat the fuel line enough to vaporize it as it comes out to the burner. And they have to be pressurized to keep the flow going or they gradually go out.

I also have an attitude about using gasoline (or Coleman fuel) with caution. I have seen what happens when gasoline fumes make their way long distances along the cold earth from an open cannister to an open flame that quickly rushes back into the cannister which becomes a flamethrower. I had to tackle a kid who ran when flaming gasoline was spewed on his clothes from quite a distance. Fortunately I had a wet shirt hanging nearby and Jonathan Beckers was quick thinking enough to toss me the wet shirt as I tackled fireboy. The wet shirt minimized my own burns in extinquishing those clothes. Be careful with gasoline. That is part of what I liked about the MSR GK - it could run on diesel just fine - just don't mind the soot on the bottom of the pots.

Read my review of the JetBoil System.