I have used this product now to the two weeks almost every day, but have no competing products tested.
The Bass disc is easy to transport because it fits into most pockets and also has a removable carabiner any, with which you can hang for example on a pair of pants.
At the bottom of an anti-slip pad is attached, which hardly disturbs.
However, he emphasizes not so good slices. (Long)
The battery life is surprisingly long, so you can usually hear several days of music, and only needs to load the bass disc.
From the bass disc I had not thought that I can take a shower with it - but after a short consultation with the Support was confirmed to me that this was possible.
And it works!
Thus, one can his songs now super sing in the shower, and has plus super support.