When it comes to expressing the idea that something has recommended itself, there are many synonyms to choose from. For instance, you might use the phrase "has proven its worth," which conveys the idea that the object or concept in question has demonstrated its value through actions or results. Alternatively, you could say that something has "made a compelling case for itself," implying that it has presented convincing arguments in favor of its own merit. Other potential synonyms for "recommended itself" include "established its credibility," "earned a reputation for excellence," and "demonstrated its usefulness." Ultimately, the best synonym may depend on the context in which you are using it.