I'm using the FlyRig for amplified harmonica playing, together with a Bulletini mic.
The sound is great, the unit is very small and easy to transport.
The manual includes different presets, helping to explore the different sounds possible with the FlyRig. This is very useful in the beginning.
I am not using the plexi part of the unit, as the sound is very distorted. I assume it is more suitable to for Rock/Metal guitarists.
I am a bit unsure about the sound of the speaker simulation, right now I am not using it. It also is not present on the XLR output, so if you plan to hook up the FlyRig to a PA, better get used to the sound without the speaker simulation.