I opened an account after reading this yesterday, curious myself about what I would think of it. I did find the process simple and smooth, and the UI pleasant on the eyes – which made me wonder why Matt Gervais would be hesitant. That inspired me to go read his comments, and when I saw that his Hotmail access had been converted to the new Outlook UI, I thought I would check on my own Hotmail account.
I discovered that I am now unable to log into Hotmail through the computer I signed up in Outlook with, although I still had access through a different machine. Not sure at this point if that will change, if it is a temporary glitch due to server issues which happened to occur in the same time frame. Interesting.