For it's price this little box is a steal. Basically you get a channel strip (eq, opto-comp, tube, di) in one little green box 1/2 size of a standard rack. I do not think you can get anything better for the price. However, it does not have the "WOW" factor. It has mic input, line input, mix input and two same signal outputs (1 channel).
The controls taking into consideration the size of this preamp is enough to shape the sound and to add some lows and highs. Also mid boost/cut is adjustable to frequencies. The sound is clean, but the tube warmth is satisfactory. The meters are good to have.
The build of the box is solid, it does not weight much and looks much better in real life than in the pictures. I do not mind the green color.
The sound of the EQ is neutral - you can boost very much and the added effect will be subtle in comparison to plugins. On some sounds the compressor did not work as I wanted to, but keeping in mind the price of it, I did not expect much more.
The manual of this little box is also good. It was easy to read and also contained valuable instructions on how to use different options (input, output, compression, eq) of the box. Such would also be helpful for some to understand the basics of compression for instance.
Highly recommend this preamp if you are on a budget and want to acquaint yourself with analog boxes. However, do not anticipate it to be super.