The one that is fruiting I finally got some fruit on this year and it is good! Here is a picture I took:
I didn’t thin so the size varied a lot. They taste like about every other quince I have had. This guy has occasionally gotten some blackened leaves but never any shepherds-crook shoot tips. So at least for me it is fireblight-resistant.
If you want some wood ask me this winter, this guy may be worth spreading around. I named it “Dunlop”, it looks like a tennis ball. It is a grandchild of Triumph which is a fireblight-resistant quince. It may also have some Asenitza in it, another FB-resistant one.