In terms of build, this looper is excellent. Plastic but robust, so far has survived a lot. In terms of features, it can do whatever you can think of and more.
In terms of sound, layering lot of sounds they still sound flawless despite lot of layers, the built in effects are good and very useful.
The build in headphone jack , interface feature and drum machine are good and useful for live looping sessions. Connecting this unit with other pedals does not produce any weird artefacts or distortion.
The part I don't appreciate, the settings are incredibly complicated and the manual is not very helpful. This is definitely a looper for advanced users only and expect to do extensive setup before you are up and running.