Greetings!
I downloaded it last week for a comp on which I had just changed a CD-ROM for a DVD-R/W but, also being indecisive, cannot make up my mind whether I like it or not!!
The reason I downloaded it is that a nice man in PC World told me that it has essential DVD player codecs built into it which I would otherwise had had to purchase, as Microsoft don't appear to offer their own DVD playing software.
The other alternative would have been to visit K-Lite or to download Power DVD.
I'm not too sure about it at the moment, but think I prefer the old WMP-9.
Give it a whirl: you can always revert to WMP-9 if you don't like it more than I don't!!!!!!
Be good!