ST is probably my #1 fav mango at the moment. But, I'm a little surprised that yours had jelly seed. I don't think I've ever seen a ST with jelly seed before.
I have seen more jelly seed than usual this year, and the early LZ and coco cream were indeed bland. LZ normally starts to ripen in July, so a June LZ would be really early and understandably bland.
The vast majority of my coco cream crop, though, has been outstanding. Rob had suggested that coco cream needs a few years before it starts showing what it's capable of, and my trees have finally started strutting their stuff. I had a huge crop of really delicious mangoes. It is certainly not an in-your-face, intense mango flavor like ST or pina colada. However, the flavor is very smooth and pleasing with a complexity of flavors ranging from pina colada to citrus to coconut.
PS -- Carrie is not a shipping mango. For one, it bruises ridiculously easily. Secondly, it is not very good when fully ripe. The carrie should probably never be shipped unless the shipping time can be confined to a day or two and the mango can be wrapped in a way that completely prevents damage to due brute mail workers chucking parcels around.