We use this expression to give a positive reaction in a subtle, understated way. It usually means that something is quite good or better than expected, even though it may not sound very enthusiastic at first. This phrase is typical of British English, where people often soften their praise rather than express it directly in everyday conversations.
You can use this phrase in ………… language.
Spoken
Informal
Example
A: How was the restaurant?
B: Not bad, actually. I’d go there again.