Hi timeless john, yes it is different but you really don't notice unevenness In fact I wondered what you ment when you mentioned it and they are not all over the place it may be my pics on a wrong angle but to me and others they are perfect , I just see colour reflecting from items in the kitchen and light drawn in ( to what was a dark area ) from sky lights above and the the other side of the kitchen. 🙂My first reaction was - that's different, then I wondered if I could live with the uneveness of the fixing!
To me mirror and polished porcelain are similar and the reflection should be seamless. These are all over the place and although a certain rustic charm, on reflection not for me!
We did the Tuxedo Princess nightclub in the early 90's using mirror mosaic - plenty of bling!