It will run slower from the CD than once loaded. The learning curve is greatly decreased if you just have someone there who's familiar with it to give you some help gettin around the block for the 1st time or 2. For the most part the biggest differences are just the differences between the program names.

A lot of the people I've loaded it for have brought me machines they've rendered unusable by surfin recklessly without any AV protection or having not kept up with the updates for the AV programs. Oftentimes they'll never even boot up anymore, and they figure their machine is trashed. It's always interesting to watch their reaction when I pop in the CD & it fires right up again.

It ain't for everybody, but in my own head-to head tests it runs circles around Vista. Like I said though, YMMV