Yes, I actually have 2 clonal seedlings which have both been in production for a few years. I haven't noted any variation between the two nor between mine and Walter's tree. I selected those two from a group of several dozen seeds, based on my knowledge of the tree on Walter's property -- leaf shape, growth habit, and sap smell.
I think LZ is the superior selection, but I do have a "collect them all" approach to anything in that flavor line.
It's generally a top-tier mango, like PPK, LZ, Sweet Tart, OE, etc. But, I slightly prefer LZ over OS.
OS does get jelly seed, and it's been rather prone to powdery mildew infection. Mine has also had a tendency to grow more than fruit -- not sure if this is just an issue with my tree or whether that's common to the cultivar.
1. Is it better than Orange Essense, PPK & LZ aka the GOAT according to some fans.
2. Are they likely to have any other common problems? i.e - low yield, disease, uneven ripening, jelly seed, etc.
Cookie Monster, yours OS is a seedling of OS correct? wondering if there are any variation/disease resistance, usually seedlings are better in disease resistance terms.
Travelling over the last 18 years to several tropical countries with limited mango selections, so so to me but loved by locals who know nothing else, gives better perspective on the work, magic, Gary Zill has performed. Floridians in general, never mind the world, will likely not come to appreciate his efforts in his lifetime. The relative few here enjoy his treasures in obscurity. My thinking on "what's next" aside from others replicating this feat with differing genetics is finding off types with Zill seedlings.
New flavour profiles, production, disease resistance, growth habits...all those heterozygous genes await exploration.
Did you work with any that did not match the original tree?
Where exceptional flavour meets with disease problems (for some), risk for others, seedlings also offer a chance at a better fruit. I have a project that will include finding apparent off types and "reverse grafting" budwood onto mature trees to accelerate findings...Lemon Zest remains #1...for now.
Gary's amazing results yet relative obscurity will keep anyone finding the next big thing, sober.