Recently aquired a Nostromo (Orbweaver non mechanical predecessor) for £50. After around 20 hours of gaming I'm still not as quick as I was with keyboard, but will be soon. I expect to be even quicker eventually... when I stop pulling my medkit when I mean to pull my pistol...
£100 seems a bit much though... are they doing away with the Nostromo then? If you can still get it for £50 or £60 even it would seem to be very competitive. I can't see many people wanting to take a chance with a controller such as this at that price unless they've used one before.
I always liked the look of them, never wanted to take the chance until I spoke to a guy recently who assured me they're the ****