Loud speaker with weaknesses in sound

I'll start with the positive aspects:
+ The speaker is well made. Everything and nothing sits still.
+ Klein: He is thus very portable and you can take with it anywhere. He also has a practical wrist strap, if one is, for example, run on and like to want to hear music.
+ Extremely loud: you can sit with the speaker loose sound for a group of people.
+ Telephony function: It can make phone calls through the built-in microphone also what I however do not use.
+ Control Panel: The control panel, which can be made all the settings is very clear and intuitive.
+ Battery: The battery is very strong and keeps a long time. Furthermore, it is still a small USB cable in the scope of delivery.
+ Non-slip: The battery is, as long as you provide for him on the right side, non-slip. So he does not slip off the table

Now to the only negative point:
- The sound and the quality of the music leaves much to be desired at louder volume. This is an important point for me and for many others, so there is one point deduction.

Considering the size, you can refrain from the point sound quality and I would decide again for this thing ...