I rooted a cutting last year. I received it from our local CRFG club. I let it fruit this year, the fruit is underwhelming. As the session progressed, the flavor got a bit better. I'm hoping it gets better closer to summer or as the tree ages. The mulberries are really small which is a downside.
I haven't tasted any other ripe mulberries to compare. I'm rooting a few more varieties to try. I've heard great things about the Pakistan and green Australian.
If you haven't, I would try to taste them locally before investing in them. I want to grow them as they require less maintenance than any other berries. Strawberries get lots of pest, and they are messy. Blueberries get kind of wild and wide (not a problem if you have space). Blackberries grow wild vines and need support. They can spread like a weed. Boysenberrie are similar to blackberries but the harvest window is really tight. Goes from sour to spoiled with fruit flies maggots in as short as a day or two. Mulberry are ready to propegate and grow like a tree. Easy to prune and keep in a small area.