I'm loving it as well, although I only usually play on the weekends. I'm at the beginning of the 4th mission right now, so I've made decent progress so far with only one weekend of play time. Couple that with the fact that my brother and I had a marathon Halo co-op session where we beat the entire game in about 6 hours time (on Easy, of course, we didn't want frustration, just fun), and I did pretty good for myself.
With FSW, it's great, but there are so many areas to improve, that I could only hope for a sequel where Pandemic listens to the suggestions. Random enemy locations, better camera control (IMO), farther grenade throwing distance (balance this with fewer grenades), more realistic injuries when shot, quicker response times (I hate issuing a fire command from around a corner, and it taking atleast 10 seconds for them to start shooting), adversial multiplayer play, and much much more. Kinda weird to have a game that feels just right, yet there is so much that could've been done still.