I have had NG for nearly 30 years and a pellet stove for 18 years. Back in the day, NG wasn't as cheap as it is today. I pay about $1.30/therm for NG. When using the fuel comparison calculator on the pelletheat.org website, I'm at roughly $14/million btus with pellets vs $16/million btus with NG. So not much difference, but I burn pellets anyway because I would never heat my house as warm with the NG as I do with pellets.