Focusrite Vocaster One

Works really well as just an audio interface. I really appreciate having a mute button on it but I wish that the software would work.
From what I've found the interface needs USB 3.1 or higher for the software to work. Others have said that you need to have version 1.3 or lower (which can be hard to get since Focusrite doesn't have any older versions listed).
The headphone output does also have monitoring on by default and it can only be turned off in the software, which doesn't work for me.

For its functions, it is a completely justified purchase. The only negative is the quality of the output sound in headphones and speakers. No compressor settings. Because of this, a pumping effect is observed.