Love It
Definitely do a search there is a lot on this topic.
I've been running it for a couple of years and I'm happy with the setup. I used a fire extinguisher bottle as it was readily available, and I liked the idea of a rugged bottle in the truck vs the lighter, thinner tanks used for draught.
Some things to consider; use an appropriate regulator and guages designed for the pressure and gas.
I found that in the winter the bottle tends to freeze up. I now use a long hose and leave the bottle in the warm truck.
You can't reliably tell how much is in the tank due to the nature of the gas unless you weigh the bottle (I just throw it on the bathroom scale).
There is a lot of work energy available, and no moving parts to fail. It is way cheaper though you do have to refill the bottle periodically.