I'm coming from a Windows Media Center setup with XB360 extenders. In that setup, the XB360 extenders only missed a few minor features that were available on the Media Center PC. Otherwise, the UI was almost identical to the Media Center UI. I'm interested to know how similar the UI on the TiVo extender units are compared to a main TiVo unit. (Mini VOX and Edge) Are there any missing features when using a Mini? Or does it look and feel like you're on a main unit?