(Last updated 16th July 2016)
Back in September 2010, I posted on my experience (as an Englishman) procuring and using a Télépéage gadget for use on the French motorways. I wrote that post just in case it happened to help someone. Since then, it has become more than 3 times as popular as any other page on this website and the last time I checked it was #3 on google.com (searching for "telepeage" from the UK). It would seem that it has been helpful.
Since then, two things have happened. First, there are now 80 comments on that post. Lots of those comments are people asking questions, and lots of the same questions come up again and again. Second, a new UK-based player has entered the market as a "midddle-man" for obtaining these Télépéage gadgets.
So I thought it was time to repost my original post, bringing it up to date, and including an FAQ section at the end. That way, I can close the original post to new comments, and people can read answers to the most common questions without having to trawl through 80 comments to get there.