Now, disease prone, that is not relative. If it is a sickly tree in FLorida, forget about it and try something else that taste like it and does well in Florida.
Taste though still remains relative. I was going to completely topwork a Tommy Atkins in my yard until I was told in no uncertain terms that it was the favorite of my mango by at least two people I care a lot about and want to keep supplied with mangoes. They have tasted other mangoes from my yard and from Alex's when I buy some mango including some described here as much better fruit. Just this past season they tried Sweet Tart, PPK, Lemon Zest, Carrie, Beverly, Choc Anon ... and many more. They still want that Tommy.
I had started the topwork and two thirds of the canopy had been replaced before this revelation. I had actually chopped down the last third, now I intend to keep that last third in Tommy (at least most of the regrowth) for those who love it. The tree is vigorous, had no disease issues for me, produces heavily, and makes large tasty fruits. It is however still a Tommy Mango and the verdict from us "mango snubs" is that it is inferior. Well, by jove, I am keeping that "inferior" third of a tree.