Hehe. I am figuring out as I go. I am a two week MC17 veteran. But let me tell you, it has been awesome. I converted my XBMC movie nfo files to sidecar files. I have created custom layouts for Theater View once I discovered Expressions. Yesterday I learned about Particles, this blew me away becuase I have always wanted to do what this feature will allow me to do. I am going to name that special menu Higgs.
MC17 is awesome. Out of the box, it'll do music brilliantly, the views etc... For video specifically Movies and TV Shows however it takes a bit of technical skill to get the Theater View layouts the way I like them. I still need to do more for TV shows and I will probably make some feature requests.
Playback quality for video and audio is top notch, especially since I can use madVR and LAV Filters. Actually, madVR and LAV are a prerequisite or I wouldn't be here.
Finally, this forum has been great. I have posted a few questions and got great and quick responses.