Mmm It was better than Something Something Dark Side, probably on par with Blue Harvest. There were some laughs.
- Claus made me laugh, It's A Trap is a winner as far as most gags go
- Ewoks got a chuckle from me
- Speeder bikes
- Han/Peter coming out of the Carbonite

, classic Peter Griffin.
I think the gags in the Robot Chicken ones have more punch to them, and i'd say they are a bit more carefully crafted. Robot Chicken turns Star Wars on its head for laughs with some clever sketches.
Family Guy just has its characters assume the roles of the various Star Wars characters, while they keep their Family Guy personalities. Insert a few short gags here and there without any clever, outside of the box sketches.
80% family guy humor/20% clever star wars sketches/gags.
The gags from Family Guy whether it's the series/sw trilogy can be a bit purile, silly and simple, somethimes it works, but a majority of the time its very 'meh'. Robot Chicken from my observations has some more wit and complexity.
The trilogy got some laughs, but i wasn't splitting my sides with laughter. Very much Family Guy episodes themed around and using the narrative/content of the original trilogy, rather than a set of Family Guy Star Wars special episodes.