I use it (diluted). seems cool, no ill effects I can see. Smell can be a factor (Only because I know what it is) so I try not to let any "tea" with pee hang out too long.
Molasses does change the smell, so it helps a little. I dilute at least 15:1 or much more, like 30:1.
I also use a "pee tea" to soak (no more than 6 hrs. or the smell) dried out leaves gathered from my neighborhood. Gives them a nice nitrogen bath to get things going.

Peace, Love and Golden showers for the Microbal Herds.