As a quick stopover between other destinations in the Yucatan, Campeche feels like a quiet, safe provincial city but as a WHS destination, Campeche is relatively uninspiring. As previously mentioned, Spanish colonial towns have been overdone on the list though I suppose the kind of arguments for a major port stop for the Spanish treasure fleet that worked elsewhere make sense to use here. It's just another piece that will feel familiar to anyone that has been to any of the others. 

A half a day is enough though we made it a stopover for the night. The historic centre is cute but very small and unfortunately has too much car traffic to be as pleasant as I'd prefer. For a small tip you can walk on a section of the walls. Looking down you realize that many of the painted buildings are still hollow facades with nothing but ruins behind them. Unfortunately Fort San Miguel was closed for renovations so we didn't even get to see the part I had been most looking forward to.