ᐅ Plaster instead of tiles in the bathroom

Hello everyone,

We are currently in the middle of planning our bathroom and are still undecided whether to use tiles or an alternative for the shower and walls.

The lady likes this gray plaster (see picture) quite a lot. I assume it is a kind of mineral plaster?

Does anyone have experience with it and can share some information regarding

- Maintenance?
- Costs?
- Installation compared to tiles?
- Durability?

Thanks in advance,

Best regards, Chris