Ordered this setup today after a lot of reading and research. It's a bit pricey, but from what I can see it's the best protection and comfort you can buy.
The back protector: The VERY comprehensive tail bone coverage of the race version (which is the one I got) along with the shoulder blade coverage and CE level TWO impact rating are what sold me, along with the thin profile and spine-contour.
Chest protector: It has two sets of velcro allowing it to attach to the straps of the back protector. I actually think this might work just as well as a single back/chest unit because you can adjust the chest unit's position on the straps for optimal placement.
