Well I've use the Finewoven Taupe case with my 15 Pro for 16 days. I've tossed it in bags with other stuff (pens etc.), I throw it on surfaces with rough plastic edges, in general I used it like any other case... and it has been perfect with no marks... UNTIL TODAY (I knew it was coming). I ate a sandwich that apparently was greasy from some butter that was put on it before it was grilled and must have had a touch on my hand so it left a dark mark across the bottom edge of the back, like it had gotten wet but the dark mark only faded to 50% as it dried. I used some paper towels with some soap to attempt to clean it off and I got about 95% of the mark removed so now it is very faint instead of very dark, but it appears the taupe color just above the mark got ever so slightly lighter from the rubbing. So now the top 80% of the case back is normal, then the bottom 20% is half slightly darker and half slightly lighter. I'll be honest, no one else would notice this right now (they would have noticed the original stain) but I see it and frankly it isn't a patina in the same way as leather wears its scars and color differences... it basically is just like a cloth napkin that had some ketchup on it and the washing machine only took out 95% of the stain so the ghost of it is still there. ugh. I knew it would happen but the case held up MUCH better than the initial reviews suggested... until it didn't. It's still fine, but after this I know it isn't for me. I'm ok being out the $60, I've certainly lost more to Apple since my original 1984 Macintosh... I just put on the Clay Silicone case.