I tried several of the fruits, and found that though very sweet, they really didn't have much flavor to speak of. I also figured out that the juice stains. I had purple finger tips for the rest of the day.
Even though I didn't think the fruit was anything to get too excited about, I picked about a quart of berries and brought them home. Boy #1 thought they were great, and ate them by the hand full. Dr. Wife was not impressed. Even so, mulberries fruit at a time when not much else is ripe, so they are valuable in my pursuit of year-round fruit. I brought some cuttings home to try to root. Even if I'm not wild about the fruit, I can use them for rootstocks for grafting other tastier mulberry varieties.
A couple of months ago I got a Pakistan mulberry from Glen Miracle. The Pakistan is a white mulberry (Morus alba or macroura), whose long purple fruits are said to taste wonderful and reach 3-4 inches in length! I planted it in the front yard where it will hopefully start producing fruit in the next couple of years.