well, not much for the stove, ive heard it doesnt work as well, but being able to have a gas fireplace also is of value.

I would say it's mostly a matter of personal preference, convenience (risk of power outages vs "inconvenience" of refilling the propane tank), and expenses involved. If you need to install a propane tank, run a line, etc just to switch, I don't think it's worth it.

If you prefer cooking on gas and already have everything nearby, why not? As long as the stove is set up for propane, the performance should be very close to that of a natural gas unit. We have plenty of satisfied owners running their ranges on propane.