It's basically been sitting in the box since I bought it, until last week. It took days to figure out the right settings on the PA to get vocals to register on the thing (and also we discovered the PA needed a little work - all the pots on it were dirty and there was a lot of noise that a little tuner cleaner took care of).
Last night, I started playing with it. However, I haven't worked out a hi-fidelity reliable way to record what I've been doing, and I didn't save anything I built up last night on the pedal, but it's an interesting way to compose a song using only vocals. Here is a poorly-recorded snip of a loop that I recorded last night.