I'm getting to grips with COMMAND as well.
One thing I don't really like at the moment is the Radio. I think I need to get to know the presets better, when I go from radio station to radio station with the big blue box display, using the wheel, I don't like the way it plays the station it's on (if that makes sense) as I scrool from one to another - I'd rather have to press the button to select it. Small moan I know, it's just different to my previous car.
Also, I keep getting into a situation where is says "Bluetooth is paused". What the heck is that all about? I thought it just mean sound muted, a couple of times I've had to press play on the phone to get things started, that can't be right.
Oh one last thing, I like traffic announcements, but they come in and such a high volume I nearly crash the car

Must look into why that happens.
I do love the engine data screen, I have no idea what any of it means (in real terms) but I like watching the needle on the dial go up and down like a big rev counter haha.. Oh and watching the little red spot when in sport + mode, does the wife mad....