I lived in モンペリエ for a summer and found it pretty dangerous and the dog droppings are everywhere! Wouldn't really recommend it for a long stay but if you're in town for the afternoon, the shopping and siteseeing is pleasant. The beach is a nice destination for an afternoon as well.
Sète … Sete has beautiful beaches and it's a great medium-small town that isn't trampled by tourists.
I lived in モンペリエ for a year and spent holidays there several times. I love it. It's a little rough around the edges, but all in all, very beautiful.
We visited モンペリエ for 3 weeks in the Summer. It is a fantastic city with brilliant architecture. My children have asked to visit again, which we will do in October. We had no problems, and didn't notice any dogs' muck.
モンペリエ's people are the worst people I've ever met. Cross my heart.
モンペリエ is awesome -- great nights out with a vibrant student life!