Well.. it arrived today and I can have to say this little gadget is tremendous fun. There's a handy metronome feature that kind of auto-corrects your timing. A downside is that although there is a microphone setting, there is only 1 input so you are forced to mess around with switching input jacks. I have ordered a AB selector pedal to allow multiple inputs so that should allow freedom to loop whatever I want.
Just purchased, and you get £1 off if you like on Facebook as well!