Depends on what you are going to pay for it. The french mixtes are sometimes hard to find parts for, especially the bottom brackets. Trek has one, but I stay away from them since I like to tinker on them myself. I had a Motobecane and stripped all of the paint off and that's where it stands today because of parts. I recently found another one at a flea market, for $12 and it needed no work, but I still worry about servicing it. My Nishiki was $40, but I can grease the bearings in that thing very easily.

Therefore, if you aren't concerned about the bottom bracket, and love the bike I say ENJOY! Just wanted to give you some food for thought.