I just got to see this, this past weekend. Saw it in IMAX 3D which made it even more neat.
K2S0 was the best. I want a sassy robot too... must be a thing cause R2 is sassy as well. Disney is knocking it out if the park when it comes to making me love their new droids though. K2 and BB8
The ending with (SPOILER) carrie made me extremely sad. I didn't know that was going to be a thing and it was sad but bittersweet. Her character says "hope" and well, okay it made me emotional.
The movie itself didn't seem too cohesive to me, plot wise. Seemed like it was just kinda... there.
The second act I think was the weakest, felt like the whole edu thing could have been skipped mostly. Loved the third act though.