2+ : Strongly Recommend!!!

For such an entry price for an audio interface, I would say it has done a very good job. Comparing to 2i2, which is a very popular competition, I could say both the recording quality of the preamp, and also the playback quality are better than the 2i2 which I previously own. Although I don't typically use the 4K button for a boost for texture of the sound in the recording stage, it is quite useful if you are lazy and trying to get a better sound just by pressing a button, especially for vocal in some live session.

There are a few improvements that I would like to see tho. Firstly, I am using 770pro 80Ohm headphone with my SSL 2+. I would say there are some situation that when you are turning the "monitor mix" knob to the middle to listen both your mic and the sound from PC, there is a small chance that the volume would be a little bit too soft when the incoming signal is not that strong. Also the indicator for loudness for input signal has the interval of 0, -10, -20, -30, -40, which is not very useful referencing to it because 0 to -10 is just too much of a difference.