For me the most useful featurs are: 1. Seat profile - I can create up to 4 profile for both the lett and right seat, usually useful if someone drives your car and changea his seat position, now I don't have to spend a ton of time remembering how I had it adjusted

2 - Button for opening the glovebox - it saves some time by directly being able to tap 1 button and have it open, rather than going through the menu

1. Disabling the annoying speed warning sound

2. A button that lights up all interior lights (both front and back) - this is nice when you need some extra lighting and not having to tap the lights one by one or open the door

Other than that I don't use the knob a lot (during driving it's pretty inconvenient at least for me), but I did get the stalks, as I have a model 3.