Use in the shower is very easy (turn a large button to change the volume, two large buttons to scroll through the station list prerecorded), but it is true that to program radio stations is much less intuitive.
I had the first radio at taps (so she received no water badly) and then up to the shower head. No malfunction at the moment, including malfunction due to water. I do not understand the reviews from people who complained that the product is not sealed since the manufacturer claims not simply that the radio has this quality there. Sometimes it is enough to read the product description.