I recently got to go to a great place called Tropical Fruit world. It's the biggest and best (in my opinion) tropical fruit farm in Australia. They grow >600 different fruits.
Last time I went I bought my first ever Mamey Sapotes - a Pontin and a Maganta.
The Pontin ripened first, and I quite liked it rich, wierd taste of syrup-y pumpkin pie, but I could only eat so much.
By the time I had finished my 1kg Pontin (3 or 4 days), my Maganta had ripened and was about going bad. I ended up procrastinating and never ate the giant fruit on my kitchen bench - I just went off.
Here is my point: I just reckon Mamey Sapotes would be better at a modest size, like the size of a large mango ~ 450g.
My reasons for my opinion are:
1: Smaller fruits are easier to eat in a single helping, making for a filling snack.
2: If you have to get through an entire giant Mamey Sapote without it going off, especially for a first-timer, it's not a great experience. Too much Mamey Sapote! Mamey overload!
3: Australian Mamey Sapotes are on the verge of going commercial, and I think that for the everday shopper there would be greater uptake of a smaller, mango sized fruit, than of a Giant that costs a fair bit, that you might not even like.
Anyway, that's just my opinon, what do you think?