I can't believe people are saying that the lightsaber duels at the climax were weak. Those lightsaber duels between Ren and Finn and Ren and Rey were amazing, and better even than those of the original trilogy. It looked as though the saber strikes actually had weight to them, and the choreography made it look like two people trying to kill each other with swords, not two people engaged in an elaborate routine of "hit the other guy's oversized glowstick".
Also, Rey is easily the best out of the new characters, followed by Poe. I love how Finn was mooning at her Rey was trying to get shit done the whole time.
Cons: Some of the exposition, particularly that of legacy elements (yadda yadda Millenium Falcon, etc.) was a little weak, and the climax makes too much use of "_______ is a free action", (particularly with Rey's "getting back in touch with the Force" moment, they could have used a time dilation moment or something to show that all this is happening very quickly from a frame of reference that's not her). Finally, I'm a little annoyed that the New Republic is apparently gone, and hope that there are still remnants, particularly fleet assets, that escaped the devastation.