Boscofats, You can easily set it and forget it, its just with the triple crossover feature many people like to experiment what sounds better as Gonk mentioned. Also I think the most commonly brought up setting problem is the subwoofer. Instead of being able to remember different levels for each sound-field you must manually (on the remote) change it. I did not have this option on my previous receiver so I don't miss it but I can see how it would be beneficial.
So to Answer your question in a simple way, you can take the 950 out of the box, calibrate it once and start enjoying. If you like to tweak, there is plenty to play with but if you just want great sound done simple it will do that too.