For StarWars fans - lovely show! Ties up the 'loose ends' into Episode IV quite nicely. Lots of SFX eye-candy (as expected). Lightsaber battles, ties up most of the 'loose ends' for the prequels - pretty much what we would love to watch.
For non-StarWars fans - dialogue is bad, story is not that great, "waste of my time & $$$" (seriously, I heard a guy in the lift mention that), "I prefer LOTR", etc.
Saw it today also. 100% agree, mediocre movie if it was not for all the "oh, that is how it started..." type things. Still much better than the Awful #1 and the Sappy #2.