I agree with sympatico. I have occasionally seen the fireworks from the 192 (outside TGI Fridays) which was nice in an "ooh there are some fireworks" kind of way. But not spectacular and the ones that I saw would be even further away at WH. I couldn't even tell if they were MK or Epcot fireworks, but would guess at Epcot - because MK is further away.
To really see and enjoy the fireworks you need to be nearer to them - most of the fireworks displays at Disney are more than just the fireworks themselves (music/lights/lazers etc)
BTW - just done the illuminations cruise last week - awesome!!! Highly recommended.