Having purchased this via download over 24 hours ago, I still cannot download it thanks to a problem on the microsoft website. It doesn't say what the problem is, just a short message to say there's a technical problem and to try later; which I have several times. You don't even get that message if you use a browser other than internet explorer - it's just blank.
I usually use open source, but thought purchasing this would make a project I'm working on easier - I was wrong, don't bother, use an open source alternative.