I need time to digest it. Just saw it. I was thoroughly entertained, hit that nostalgia sweet spot, and really liked the new characters. I also really liked that I knew basically next to nothing going into this movie.
Having said that... this movie played it really safe, almost to the point where it played like a "greatest hits." Early establishment on the sand planet? Check. Plot revolves around trying to recover plans from a droid? Check. Evil Empire/First Order with an ultimate weapon that the Rebels/Resistance have to destroy in the nick of time in a mashup of what they did in ANH and ROTJ? Check. Force vision sequence? Check. Cantina-esque sequence? Check. Conflicted antagonist with family issues who's subservient to the actual big-bad? Check. etc. etc. It's almost like Lucas's infamous "it's like poetry, it rhymes" taken even further.
I know this probably sounds overtly negative, but I came out of the theater with a feeling of "really liked it, but..." kinda feeling. This was kinda how I felt after I watched the Abrams Star Trek really entertained, and completely digging the nostalgia but wanting the franchise to go off in its own direction and assume its own identity. Plus Abrams had the extremely difficult task of making a movie that had a huge amount of expectations and hopes, and in that I think he largely succeeeded, although again, did it by relying on what worked then carving out completely new territory. I think with Rian Johnson at the helm for Ep: 8, we'll hopefully move into less charted territory.