I liked it but I'm a history buff. The Franco-Prussian war is not everyone's cup of tea so this may be too much of a "niche" site for the average consumer. If you have a passion for history, especially this era then take this in. If not, you may not find the visit worth your time. Parking lot at the base of the citadel requires a pretty steep walk up of about 300 meters and would be a problem for those with mobility issues. I have visited this site before, about 11 years ago and was disappointed that the underground section was not accessible.