I love the fruit. It is tasty. My grandma boils guava leaves to obtain tonic for stomach discomfort. The liquid has a distinctive aroma but its not bitter. I dislike bitter herbal preparations. Guava trees were one of the common garden trees when I was growing up. Then, my grandma had a guava tree that produces fruits with brown flesh. However, well ripe guavas are not easily available in my area now. Let me blame urbanization and people's ignorance of its benefits. Thank you @cryptokraze for the information.