Comment OS X Support (Score 5, Informative) 575
Personally, I am very happy with the new Silverlight-based movie player. The Windows Media Player-based solution offered no OS X support and I was forced to use VirtualBox to watch NF movies.
Also, in my experience the new player loads much faster and fast forwarding and rewinding works much better. I have not noticed a decrease in quality, probably because my Internet connection wasn't fast enough in the first place to get the highest-quality streams.