The boilerplate is readily repeated online but I have found very few actual reports. I dug up an old thread in October to ask the same question: The best Asian Pears - #641 by slartibartfast
Here is the one direct anecdote I got in response:
I have two in my backyard since they are stocked at local nurseries. I’ve grafted one over to Korean giant and have not decided on the other. I’m leaning toward grafting it over to a more well-known variety, as I’m in Zone 5b, so the true merits of juicy jewel don’t apply as much.