As Adam mentioned, the plastic produce containers are great in helping to to prevent bird and squirrel attacks. It's not practical in a large commercial setting but it works great for the small homeowner. I don't buy produce in plastic containers since I mostly grow my own or buy or trade with other growers but instead I have asked many friends and neighbors to save them for me. It also keeps these out of the landfills since many people still don't recycle them. I do recycle them after they get ripped up. Have used them on Mango, Abiu, Mamey and even tomatoes.
Regarding the taste of the cultivars...my choice hands down is Pantin. The Pace or Excaliber are very nice and Magana is last due to the uneven ripening and overall taste & color of the pulp. If you were to do a taste test with 2 perfectly ripe fruits, I have no doubt Pantin would easily win out. Two years ago I visited Bryan Brunner's Farm in PR and his Magana was loaded with HUGE fruits, I mean 5 and 6 pound giants but they were rotting away because no one liked them! He could not even give them away.
It's possible that TARS in PR has a bigger Mamey collection than TREC but I have not been impressed with the accessibilty of their collection to growers. TREC's collection has been studied more and they actually publish good cultivar information. I will try to find out how many each place has to settle the discussion.
That is my two cents on Mamey!