Anyone heard of these systems or has any advice on them?
I've been offered one brand new for £650 (genuine with receipt)

Just wana know if they're any good...

 

My mate has fitted one of these and says it was brilliant, the guy whos car he fitted it to was a sales rep who was going abroad for 3 months and took the car for work, when he came back he called in and said how chuffed he was and it never missed a beat even in various countries!