I ate a bunch of these from Alex (Tropical Acres) this year. They are now one of my favorite mangos. Very pineapple-citrus (but not orange)-guava flavored. In fact, it really does not taste much like mango. If you were tasting one blind, you would likely call it an unknown tropical fruit, not necessarily a mango.
I really love them. I like them so much that I ordered them in 4 separate boxes this season. And I got some budwood to grow for myself. It is so uniquely flavored in the mango-verse, I can't really compare it to any other mango. A truly excellent fruit.