Flawed? Not at all. BUY IT!
I have one of these holders for my old 5800. It's good, does the job well. However, there is (possibly) a design flaw with the clips for the N8. The bottom/top clips (depending upon your mounting preference appear to be dead in the centre, which will, I think, obscure the charge port on the N8! Not too good if you're using the sat-nav functions on a long journey perhaps.
It doesn't obscure the power socket. It can be a little fiddly getting the plug in if you have it close to the dash, but otherwise BUY IT!