With many more dealerships as well as many auto dealerships and tire shops now offering nitrogen free with tire purchase (in place of the free air), I'm sure that many more of you have tried the nitrogen route.
Care to share your experiences?

I was adding air every two or three weeks in my new 5th wheel. Finally paid the $25 to have the nitrogen put in the four tires. It's been more than four months and a tad bit over 2k miles on the trailer. Checked the pressure over Easter weekend and one tire lost approx. 2 lbs. the other three tires no detectable pressure loss. That alone has made it worth the $25 I paid!
Costco now provides the nitrogen and free top off if you buy tires from Costco and they have the meter that tells you what percentage of nitrogen you have in your tires.
Like when synthetic oil came out....at first everybody was skeptical and now it's available everywhere. I think it'll be the same for nitrogen. I see on the nitrogen locater web site that even the local Nissan and Ford dealerships have nitrogen.