I am, I've been playing it regularly (almost every week-end in fact) with my sister since release.
IMHO the multi isn't quite as fun as ME3 (mostly because you're not shooting guns) but they definitely made some effort towards making it something a bit more involved than just sitting in a corner of the map and shooting endless waves of enemies like in ME3. The semi-random nature of the map helps to a degree, but you get quickly to see all the variants possibles after a few dozens playthroughs. The network code is I think at least as good if not better than ME3's. The boss waves and the late addition of dragons are also good gameplay features, and all in all I hope they'll keep some of the good gameplay ideas for ME4.
If you guys are up for it I'm game, but beware, I've got a ton of stuff unlocked :-)