The phrase "nice bit" can be used to describe something that is particularly enjoyable, impressive, or appealing. There are a variety of synonyms that can be used in place of "nice bit," depending on the context and tone of the conversation. Some examples might include "excellent piece," "lovely detail," "impressive feature," "delightful touch," or "charming element." Other possible synonyms might include "splendid snippet," "marvelous aspect," "wonderful attribute," or "delicious morsel." Ultimately, the choice of synonym will depend on the specific situation, as well as the speaker's personal preference and style of expression.