Ok, whoever designed the installer for this stupid game needs to be beaten within an inch of his life.
So, I have two DVD drives, D: and E:. I started installing Mass Effect 2 with the first disc in the E drive. Partway through, I get prompted to insert the second disc, and the D drive automatically opens. I close it, open E, and switch the second disc in there. No dice. Finally, I relent and put disc 2 in the D drive. Seems to install fine, but then I try to run it and I get a lovely crash. Checking the support forum, it turns out that I'm missing roughly 2GB worth of files, because THEY DID NOT GET INSTALLED FROM THE SECOND FREAKING DISC!
So, I uninstall the game and go to reinstall it. This time, partway through Disc 1, I get an "Installation Failed" error when the installer gets to "english.rar". Back to the support forum, where currently I'm trying an alternate method involving manually copying both CDs over to my hard drive and then installing from that. If that doesn't work, I don't know what I'll do, since Best Buy probably won't let me get a refund on a game that's been opened.
tl;dr version: Save yourself a whole lot of pain, and get the game off of Steam (or through *alternate sources*), instead of paying $50 for a massive @#%^ing migraine on 2 discs.
Sorry for the rant, just felt the need to get that off of my chest, and warn anyone else who's wondering which version to get.
Edited, Jan 26th 2010 9:02pm by RajiFarlander