I like the sheer level of control I get over most things, but I do have a few issues:
The biggest is that it seems like volume gets screwed with if there is another video in a tab. Like there's a maximum amount of volume you can have and the programs have to share it (and that wouldn't be so bad if the majority of the volume of the front page was given the most volume)

A lesser issue is that I would like to be able to have the video appear in the top left/right instead of the bottom.