How long have you been using it?
I tested it several months as monitoring system for a drummer
Which feature do you like the most / the least?

It looks nice and it's light. These are all its advantages.
The sound is shrill and if you use a real pair of headphones it doesn't have enough volume.
The limiter is more a compressor than a limiter, very unpleasant for drums.
The power consumption shouldn't be neglected.
In short, it's not great.

Did you try any of other models before buying this one?
No

How would you rate its value for money?
It's pretty cheap, to be honest.
But it's unusable, so even if it costs only $50 it's too expensive.

Based on your experience, would you buy this product again? ... *
Certainly not.