Gears of War

I've played quite a bit of the game on the 360 and I was waiting to pick up the PC version, finally managed to buy it at a local store last month. The game looks quite good and I liked the cover mechanism employed during combat. The missions are very good and the skirmishes are staged evenly with the area always providing lots of cover. Even though I prefer more realistic shooters (i.e. no monsters/ aliens) I really liked this game. The story does progress nicely through the missions and provides a good backdrop for the game and its sequels.
The game requires a higher spec'd PC than Half Life 2 but its still easier on the system than Crysis without managing to look too bad. I would recommend this game to any first person shooter fan. Oh and please tell me how to use the chainsaw effectively because somehow I can't get the hang of it.