non spoiler impressions for the first hour or so:
On the game:
Amazing. What a way to start the sequel.
I don't know how often ME2 will reference choices made in part 1, but it did irritate me that none of my choices were reflected because i played with a new character(beat part 1 on 360, playing ME2 on PC). It irked me enough that I've downloaded a save that matched the closest to my playthrough on my 360 char, I'll be trying that out later today. Other than that, just a tad disappointed at the graphics a bit. Character armor looks a bit dated but the faces look great. Wish the hair looked less than a glued on helmet though. Voice acting so far I like better than the original, especially Miranda. One thing I liked about part 1 was that I never had to worry about running out of ammo, but I guess I'll have to keep an eye out for it in this sequel.
Cerebus Network:
Didn't know I had to have an EA account to log on to the cerebus network and I hate it. This stuff should really be transparent. Not worried about the bonus content for now, so I won't even bother with this section until later.
On the Prima Guide Book:
This guide book looks a bit smaller than the ME1 guide, I hope it's not because of less content but because it's better organized. I haven't really looked at the pages other than the initial character stats because I don't want to be spoiled by mistake.