I have never seen an install process like this.
It should be as simple as giving me an option on the disc I bought if I want to install add-on to existing copy of SC2 or the whole game. It got no data from the cd!!
I tried to do clean install but it is insanely slow and switching between cd and internet download with no information on how many MB it is actually downloading..
I think the install process is not good at all and it cannot be any worse.