Roller shutters in the guest bathroom, yes or no?

Did you install something special there? You don’t even have to cut or push up the shutters. Without additional protection, they are pressed out of the guide within a few seconds and then lie on the lawn, and the wider the window, the easier it is.

The guide is anchored every 30-40cm with a long screw. Last winter, when a shutter was frozen shut and I tore it down halfway with considerable force, I had quite a hard time removing the shutter. If the shutter had been completely down, I wouldn’t have been able to get it out (pushing it up from the lowest position was not possible at all). But I also didn’t try it with a crowbar on the guides. Therefore, I can’t imagine removing the aluminum shutter quietly and effortlessly.

It's easier than you think and almost silent. The screws on the sides only hold the guide in place, and they don't help in this case either. However, the armor is flexible, and this increases with the width. In other words, a 70cm window is more difficult to open than a 1.80m patio door.

You don't have to push up at all. Nobody does that anymore nowadays. Too exhausting and little chance of success. But pulling it out of the guide (of course not with bare hands) is quick and easy. A screwdriver is enough.

I find roller shutters generally very, very ugly and would only accept [Raffstores] as shading in a new building. I have roller shutters everywhere and hardly ever close them, except in the children's room facing west as sun protection sometimes. Closing the roller shutters when showering... I prefer to shower with the window open. -> On the guest WC facing northeast simply pointless.

I like it when someone watches me shower. :)

We have electric roller shutters everywhere except in the guest WC on the ground floor and in the bathroom on the 1st floor. There we chose frosted glass. The guest WC has no shower, the window is rather small and has a high sill. I am not bothered by the "missing" roller shutter there. On some days in the 1st floor, I did wish for a roller shutter. The window is large and has a normal sill height. It doesn't really bother me in terms of privacy, but on hot days it does get warm quickly in that bathroom, even though it only gets morning sun. However, it doesn't bother me enough to retrofit one there now.

I find roller shutters generally very, very ugly and would only accept Venetian blinds as shading in a new building.

But that is only the current mainstream for the reduced Bauhaus style etc. In 10 years, people will feel comfortable again with carpet, sloping ceilings, and without the blinds inspired by industrial buildings ;) because it is the little part of the house that still gives a sense of security - and eventually the time will be ripe for it again. But the OP won't care about that now ;)