Nice interface and great features, few inherited from its major competitors – Quick time and Winamp and it makes a kool music experience.
Visualisation are noticable and very smooth.
The best feature that I liked & to be noticed is the enhanced search in WMP – it is far ahead from that in WMP 10 and you will definitely love it! There are so many options to sarch for a song.
The main hiccup is to import media library from WMP 10 to WMP 11 and if it of more than 10k songs, boy, you better go out for a coffee break.
Few bugs are there like sometimes it miss out when you want to add only one file!
Still podcasting support is missing.
Better to wait for final release as still there is lot of scope of improvement!