I can compare it to the X3
Much better unit than it's predecessor in terms of capabilities, build quality.
Much smaller size, Much Larger screen.
Datalog and display is easy to look at and will sit attach to the windshield with an after market mount.
Wifi
I may be tuning remotely with it tomorrow, If I do I will let you know more.
Going from an x3 to x4 Lito had this to say " we will need to do new config files, X4s need GenII to work and that damn thing wont allow making proper config files without reading the car"
So Live Link GEN II Data Logging Software.
Again I will find out some things tomorrow.