I looked into this unit but dismissed it as it was rather bulky and ugly, plus the mounting options limited where I could put it (I hate windscreen mounts!).
At the moment there arent many new devices coming to market as satnavs with built in camera locations are killing these smaller companies.
A much stealthier device which I've used before is the MicroRoadpilot (not the "GO" version) but it does require a proper install. The flip side is that once installed (say by your mirror) it cant be seen from outside and as such it doesnt need to be removed each time you stop.
I've been hoping for new devices to be released for ages as all of them have issues, but it looks like I'll be waiting a while