I`m too can now report my experience with the coleman unleaded, after our 2.5 week island trip and using it daily (wildcamping).
We start with a full tank (coleman fuel) and had the same experience than bevore in africa:
It need his time 3-4 mins to produce a blue flame (yellow flame will produce more soot) - but also then you have to handle a dirty soot bottom.
The power is ok, not like gas but quite ok to cook on two flames.
After the tank was empty we use the unleaded fuel from the gas station. With that fuel you will need 6-7 minutes before the yellow flames get blue. Also it produce more dirt than on coleman fuel.
If you use the coleman mit yellow flame, the bottom of you pan will be black of soot also when you use it once, will makes everything black what get in touch, finger, towels you use to dry them, every place you put will put it. To wash it, need time, hot water and effort.
We dont love that device, but we also dont find a device who is that handy for a mobile 4wd overlander kittchen setup.
It is bulky, but if you try to replace it with gas - you end up with more space used, or a less practical if you look to a windshield and so on.
For extended travelling we will carry not just a spare generator, we will carry a complete Tank/Pump/Generator Combo. Remember that our first generator died in africa, after 3 weeks using (twice a day).
As you see, we dont love the device - but currently we didnt find a way arround the coleman. But a way to live with it ;-) For Weekends the soot stuff dosnt hurt. On extended trips it is uncomfortable to keeping your stuff clean, your towels clean.
Of your Kitchen-Setup is not mobile, you did built a kitchen in your drawers at sample, i would intend to use a campinggaz gas setup.
The blue gas bottles we did find everywhere on remote places, from asia till africa.
Surfy