Heard many good things about the similan islands. However I do not dive and I only snorkel. Is it then worth the while and worth the money then to go on a full day snorkelling trip to the similan islands or am I better off going to nearby small islands off Phuket for a snorkelling experience.

Anybody would care to recommend how much a full day snorkelling trip to similan would costs? any particuarly good agencies to go with?

any other comments appreciated. Thanks