The speaker is relatively large. (S. Photo for size comparison). The suction cup holds very well, but I have the speakers after each shower procedure done because I'm afraid that the speaker could fall off overnight. This is purely a safety measure. The suction cup is very strong!
The Soundqualit is ok for showering. The volume is sufficient completely, as long as the speaker is within their reach.
It is handy that you can also accept calls in the shower and can talk about the built-in microphone with his interlocutor.
What bothers me somewhat, is the constantly flashing in operation blue LED.
All in all it is a solid speaker which is perfectly adequate, if you take a short to hear two songs in the shower.