Valeton GP-50 / Multi-Effects Processor

The hardware is solid. Lots of connections (I chose this pedal because it has stereo out, but the expression pedal inputs, 3.5mm phones (or line) outputs, MIDI in and THRU, USB, Bluetooth - very comprehensive.
It sounds good too - I've only had it two weeks, but it offers lots of quality FX - for bass as well as guitar. I'm just beginning to discover the power of the EXP input.
My main gripe is connecting it to computer and, especially, the Android App. I simply failed completely to connect with BT via the standard app. The AppStore version of the app simply couldn't see the GP-50. I had to opt-in to the beta version and only then could it see the GP-50. So poor marks for App. At the price, though, value for those needing lots of features without burning thousands of CHF!