This thing is great. Everything you've seen and heard about it is bang-on the money. The sound quality is excellent, both with distortion and clean, and is every bit as good as its counterparts; arguably better. There is no signal loss or degradation when on or off. Latency is almost perfect; it's barely noticeable. Because the footswitch is soft to press, it's hard to make a mistake and miss-time your feet.
The only problem I have with it is, you can't undo overdubs further into the piece, you can only undo the most recent layer. So if you don't press undo for long enough you can actually record something, whatever your guitar is doing at the time, and then you can't undo the one you really wanted to undo. If you try to undo again you just redo the mistake. This is the limitation of such a small device.
Other than that I'm really happy. Hopefully the switch will last long enough, because I've heard they're not very rugged. The size is smaller than you'd think, the knob feels comfortable to turn, the light and sounds to distinguish where you are in the looping phase are all intuitive (though you can't see the light when you hover your foot over it), there is zero perceivable latency, and the sound quality is excellent.
I'm happy - though I did just break the nut on my new Telecaster, so yeah.
. Only downside, the low e-string is snarrling from the second to the 7th fret. Will try it again this afternoon and the probably return it for another one...
he said he liked it but it wasn't what he was after 
