"Can't complain" is a phrase that is commonly used to express satisfaction or contentment with a situation. However, there are also several synonyms that can be used to convey a similar message. "No complaints," "Everything's good," "Not too shabby," and "All's well" are some examples of phrases that can be used to indicate a positive view of a situation. Additionally, "No worries," "Nothing to gripe about," and "It's all good" can also be used to convey a sense of satisfaction with a situation. Using these synonyms can add variety and nuance to conversations and help to express contentment in a more impactful way.