What the internet does not tell you about Zelliges - oh wait, here it is
If the website says bumpy, they mean top, side and bottom, and they forgot to mention the indentations.
If they say thickness may vary by 1.5 mm, they mean thickness will vary by 5 mm occasionally plus your tile can be flat, curved or hollow.
If they say try to minimize sharp edges, they mean there will be sharp edges whatever you do. Do not expect baby-smoothness and take extra care while placing them. Zelliges are tricky.
But you may still love them. I certainly do.
I helped the tiler because he wished to spend this Christmas with his family. Easter too, if possible. So I pasted while he cut. Pasting isn't that difficult if you take it easy, but I tried cutting a few as well and failed miserably in spite of what the tilerman said about all those other people who complain about the difficulty of cutting tiles "they probably don't have this cutter" pointing at his machine. Well I tried, and it really wasn't the cutter making the difference, it was Himself.
My tiler is old, and he rocks.