I have had two brews infected with this, a Berliner Weisse and a Dunkel Weizen. Being a tight git I couldn't bring myself to bin them so just bottled them. I have to say they tasted more bitter than neat lemon juice!Looks normal to me. If you get an infection on the surface it tends to look like this.
My elderly neighbour wanted to try one as he likes a sour beer. He very politely said that he thought it was just a tad on the sour side! Slight understatement there I thought, but he is a proper gentleman. Bless him.