Do you mean Monthcavin les Coches? If so, we like it, have been 3 times. It is a small resort, not much night life but v family friendly (which is what counted for us). We have always been in the Easter holidays, so snow can be sparse and skiing in/out has rarely not always been possible. There are 2 ski schools, ESF and Evolution Somthing, which in our experience was much better: english speaking instructors, good child care outwith lessons etc. Anyway, I'll shut up, not sure if there are MORE Montchavins?? HTH
Montchavin is a very cute little resort, but with good access to a large ski area. Very traditional in feel, the village is very french, and locally run. i.e. the mayor is the baker, who also runs a ski shop etc. Just a couple of bars, 1 nightclub, and some lovely little restaurants.