I tried it. It healed a little red mark (maybe old Acne scar?) in just a few days and made my skin feel soft and smooth. I think it helped even out my complexion. It didn't do much for the laugh lines around my eyes, but then I only tried it a few days.
The drawback is applying it in liquid form. I'm going to make some of Sophia's skin cream with urine and jojoba oil and start using it every day. I don't wear foundation so I'm happy to find something that really helps the texture and the color of my skin. When I applied it to my hands it did smooth out the wrinkles just as well as any expensive moisturizer. But like moisturizer, the effects didn't last more than a day.
What I've found is that the first urine of the morning smells a lot stronger (worse) on my face than later-in-the-day urine. First urine may be richer, but it smells too much like Eau de Toddlers Mattress for me to want to wear it in public.