The answer will depend on which beach you visit. Jampore has good attractions but Devka beach lack cleanliness. Note that all the Daman beaches has black sand but clean water. At places you will find beer, alcohol bottels. Authorities are working give it a facelift and soon it may make to clean beach. Thumb rule, if you are going with friends for party- you will like it, but with family restrict yourself to Jampore beach for now.