Large format tiles - Installation problematic?

I spoke to some tilers who actually wanted a "large format surcharge" from me. However, if someone wants two to three times the price for a 60x60 tile, then either
- the base price is very "attractive"
or
- the tile
- the screed
- the skills of the tiler
must be extremely modest. He would not come into my bathroom. The one we ultimately decided on knew our tile and its quality and saw no problem, on the contrary. He hardly installs smaller formats anymore.

We have calibrated wall and floor tiles - only in the basement on the floor not.

The wall tiles have a size of 33 x 100, the floor tiles 60 x 60 or 45 x 90. Calibrated has the advantage that the joints are narrow and yes, the tiler has to work precisely here, otherwise it looks bad. And the walls should be straight as well, otherwise it's like Andimann says...

In our shower they are not perfectly straight, but there is no raking light, so it is not noticeable .

There was no surcharge and the argument about the bowls is correct - we got the last batch of plain Villeroy & Boch tiles. The following batch was thrown in the bin because crooked - next delivery date in week 14 and we are still missing some . But since it's the stairs, not so bad, we'll take a different format.

A good tiler should point that out to you.

Our tiler has laid almost exclusively random bond with the wood-look tiles. The advantage is that there is almost no waste. I always thought half bond was more difficult because with long narrow tiles the "concave bottom" always directly borders the concave top edge. Our kitchen splashback is 60x120. The tiles are incredibly heavy, but our tiler managed it.

Do you know if decoupling systems are generally used with large-format tiles?

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What for in new buildings? I only know that in shower areas - but not used by us either.

We also have almost everywhere 60x60cm. With a good screed layer in new construction, no bigger problem. But you should not choose the tiler only based on the price. Our tiler also had one of our sample tiles in 90x90cm. The material per m² would have cost about 15 euros more and the labor about 12 euros more. Additionally, we did not like the format.