I was looking on the Best Buy website saw this tablet for $399, $100 cheaper than the PlayBook which I was planning on buying. I have a few questions: 1. To use this tablet do you need to hook it up to a computer to use the full experience? Why exactly is it called 'transformer' ? 2. How does this compare to the Xoom and Galaxy Tab? 3. To people who own it, any complaints? Is it fast? Thanks.