I already have a ZACK towel rails in matt aluminum which I'm excited and I have therefore decided to test for my purpose on this product.
Optics: look great, and the supplied holder fits nicely into the overall picture of the coasters. You take on extremely valuable and are not prone to fingerprints! Great quality.
Use: Even on glass they are tired, you do not have the worry that something slip. You are absolutely flat, no tilt or the like.
Cleaning: Simply use a cloth, slightly susceptible to dirt and fingerprints.
Conclusion: I would recommend this coaster every likes the stainless steel finish. I would buy it again at any time.