I tested him right in the shower and have to say that it served its purpose well. The coupling to the mobile phone via Bluetooth was not a problem and went very quickly. The sound is okay, a little tinny, but the rush of water in the shower which is hardly noticeable. The attachment of a suction cup is easy, but to me the speaker is already fallen down a few times. Since you should help out with some hairspray and make sure that you do not install it too far up, to avoid possible damage from dropping any. In addition, the unit is only splashproof, so the attachment is off recommended by the direct water stream. The operation of the buttons works fine. The functions (Play / Pause, Next, Previous, louder, quieter) I find all useful. Only I have the speakerphone not been needed since I but rarely on the phone in the shower, but I'm sure that even this is just as good as the rest.
The integrated battery is completed only once gone with me to run out and the estimated after 4-5 hours of run time. Charging takes about as long as the smartphone and running easily via the included USB cable.
Overall, I forgive 4 stars, there is this deduction for the sound quality and the suction cup. If you like listening to music in the shower, which I would recommend this device definitely! This gives a great product for the price. Who the speaker want to use, however, to longer listen to music, for example, out with friends, I would advise to use other products.