I was looking for a simple 4 way headphone amp, so this was perfect. Nothing fancy or unnecessarily complicated like the samson and behringer stuff, just a 'source select' and 'volume' control.
It works great - HOWEVER, one day a strong smell came from the Headphone amp... which I believed to be the smell of a capacitor blowing... and it stopped working.
To this day I am unsure of why or how this had happened (Thomann said they would investigate and tell me the problem, but never did) although they did send me a brand new replacement immediately, and they covered all the P+P costs.
The new unit is working great, and I am very pleased. I LOVE THOMANN!