Just finished up the Mars mission this morning. Wow, I am extraordinarily impressed. The characters look better and move better than in ME2(especially fem-Shep's walk cycle). I'm thoroughly pleased with the slight tweaks to the combat, especially the melee. And the DLC stuff that came with the N7 edition just adds to it. Though I'm currently using the Chakram Launcher that I got for doing the demo of Kingdoms of Amalur. That sucker is AWESOME. A fully charged shot kills those jerks carrying shields with one blow.
Also, I like that you can have one of each weapon type now, even though a Soldier couldn't use a sub-machine gun previously. I was weirded out that the armory was moved. While I can kinda agree with the Alliance's thinking on moving it to the hanger deck, an armory near the airlock on the CIC deck wouldn't go amiss. I also like that the first thing Joker says to you when you go to talk to him is a complaint.
I'm kinda disappointed that the two Cerberus engineers from ME2 were gone. Out of all the Cerberus personnel, they seemed to have their heads on straight. EDIT: Never mind!