Tiling work in the bathroom - Is it allowed to do it this way?

The niche could also have been outlined with a chrome frame.

But the effect wouldn't be nearly as good as it is now.

And the more often I look at the picture, the more details I notice. For example, the rain shower panel on the ceiling (I think that's what it is)? It fits perfectly with the tile alignment. Also note the horizontal line of the tiles up to the window sill... someone really did a great job there. I think this will be one of those bathrooms where you later sit on the toilet, look around, and keep admiring the alignment.

Hey, this forum is really great. I didn't expect so many replies. : great sketch. I admit that 3 tiles really seem overwhelming! Maybe I am too critical or just too much of a layperson. Regarding the socket in the small GKW in front of the WC: A custom-made piece by the carpenter will be built in here as a vanity cabinet. Once directly under the washbasin, then 40cm free space, and then a hanging lowboard. Since no sockets should be visible "above" at the washbasin, they will be hidden on each side at the bottom.

The work is already clean, you can also see that the tiled baseboard aligns with the joints. I have seen that done differently before.

However, the customer had different ideas, he should have communicated that.

The horizontal line of the parapet should also form the first row. It is not clear whether it was cut at the bottom or if it turned out that way.

Below is cut off.