In all fairness my "thumbs down" is given without having visited the site closely, but even then the building is too little to be unique. The history of the site is interesting though, being "rescued" by Nestle. Nowadays there is a regular tour twice a month but it did not fit into my visit to Paris at all. I drove right into the visitor parking nonetheless, went to the front desk and demanded some chocolate. Not even THAT! Wow...after visiting the Ritter chocolate factory where they basically throw chocolate at you in the museum you would think they can do something with the site here that isn't so taboo. Anyhow, I walked out of the lot and turned right to come along the fence where the picture was taken (there is a plaque too). The official website uses the same angle and it is pretty - that's about it. I don't think I would visit the factory unless it REALLY REALLY fits perfectly into a visit to Paris. If you are a group of 15+ you can actually request a tour for any day.