Well I'ma mention a few things :P
1st and foremost.!) Play this game co-op! The co-op in that game is absolutely NUTS, they ramp the enemy's by truckloads, and the game seems almost created for it, almost every area in that game presents plenty of flanking/strategic opportunities. I played the single player and it was ok, just not amazing. Co-op is insane!
2nd.) The weapons are FUN. If your a regular run-and gunner (which you don't seem to be because you mentioned Tagging +9 kudo's btw), you'll absolutely LOVE some of the weapons they provide you. Secondary fire's make this game's shooting elements so fantastic! You'll get some pretty zany weapons and you'll be really surprised by how well certain weapons will handle certain situations.
3rd.) Man do you get game for your buck. This is a surprisingly long game. My friend and I on co-op passed it after some 14-18 hours of gameplay o.o; Then again we died numerous times on Medium setting :) (it's pretty damn hard xD) so we might have extended the time by quite a bit >_>; But pretty damn long none-the-less
4th.) Launch title with 40 man online multi-player :P Yup, no joke xD 40 player online matches the day I purchased it :x Not too shabby as far as consoles are concerned. Some very insane matches, and as you've seen with the weapon selection it can be very hectic :D
5.) The multi-player was geared for constant action. Standing still is VERY hard to do in this games multi, almost EVERY weapon in the game has the ability to flush you out of cover, so having full knowledge and practice of weapons makes this game simply brilliant. Another title that falls in the easy to play, hard to master category.
I also don't mean to contribute to a flame war or anything, but after beating both Resistance and Gears of War. I personally found resistance to be the better game of the two by a LANDSLIDE victory. Gear's lack of weapons, repetitive nature of the enemy's, insanely short-sided story mode, and very lack-luster multi-player just hammered that game down so badly in my opinion. However, it did have better graphics than resistance ;)
From 0 to KICKASS in .stupid seconds.
