People are having concerns about the download version because you have to deal with download problems, payment trouble, installation problems, limited activation times, ... and so on. The download might be a quick solution but I'd rather wait a few more days for the CD version and will (hopefully) not be troubled by installation procedures and problems. To keep a CD in my drive is not a big problem for me. Most games have a copy protection like that.
@Cosmonaut:
You nearly got it. Without using Bablefish I'm quite sure you mean "wunderbar" (=wonderful)
Evil-JOE