I have a qs7 (same thing). It's a nice board; it has great piano sounds, (though teh epianos are weak..), a few good drum kits (sound real!), as well as lots of orchestral stuff, including a few good brass sounds and some really awsome strings.
The FX are nice; you can have four different fx routings per mix/program, though to set them up, you need the schematics in the manual.
The interface is tough to learn (if it's your first synth), since it has the tiny window, but you'll get used to it. Also, MOTU for the QS is included, which has really nice full screen patch/fx editors if you like that better.