I've considered getting one. If their claim of it reducing irritation is true id be all for it. Though i dont feel its worth investing in a new razor now as my mach 3 works good, just need to make sure i change the blade when the green strip is gone.
and the single blade for sideburns would be quite nice for cutting them straight (and even, but i think my head is crooked so not sure if it would help me)