Simple to use, nice crunchy sound. Lends itself to a quick, spontaneous workflow. I love the built in microphone.
Somewhat lacking in features, but I guess that is to be expected in such a simple, pared down device. Still, it would have been nice to have a full chromatic scale instad of the minor with an extra seventh. I would also have loved a way to manage samples and patterns.
(Imagine what could have been accomplished if a device like this was open source! Oh well...)
As for the build quality -- I don't expect this device to last. Some of the buttons are already misfiring.