I've never installed Windows 7 with a CD, and I think normal versions take up more than 1.5GB in a DVD. It's like saying a 200MB patch for Ubuntu is enormous because you installed the system with a network installer that was 40MB only. Please, since Vista came out most of us installed Windows from DVDs. What you're talking about is not the usual upgrade nor something that happens often in SOs - and I use Ubuntu and Windows at home, Mac at work.

Recommend it. He said he uses it on a daily basis.

Well fuck me, but if it is multiplatform and bloated apps we're talking about, I'll take JS over Java any day.

"There is nothing that microsoft has contributed for open source which doesnt help their competing operating system, windows in some way." Dude, once again, they are a company. They make profit out of it. You can have them contribute to open source and make profit from it, or make propietary code, and make profit for it. Plain and simple.