I have been testing this and will be publishing my findings but I would advise against it because unicode does not show on all device types. Someone actually tweeted to me because they saw the unicode and couldn't read it. Here is how it shows up on a Chromebook:
New advertising option:
A review of your product or service posted by a Sterling Sky employee. This will also be shared on the Sterling Sky & LSF Twitter accounts, our Facebook group, LinkedIn, and both newsletters.