Not great
I had high hopes for this product as it had such great reviews.  I left it on for over an hour.  The top picture is during application, (left is black and right is brown) the second is after taking off the stencil, third is after washing and the bottom picture is 24 hours later.  They never darkened and have faded quickly.  I can only assume that all these pics of dark black tattoos are before washing.
Rating: 1 stars