The new LMS 4X is a great daily driver tune as long as you can get 93 octane fuel. Based on my Aeroforce gauge, there is no knock that results in retarded timing and the fuel pressure and cylinder head temps are in line with the 4+. I think the idle and overall behavior is smoother plus I am getting a bit better overall fuel mileage than with 4+.
You will see higher sustained boost than with 4+ but there are no wild crazy boost spikes. The boost comes on earlier and stays steady right to the shift point. It seems that they did a nice job of balancing boost, timing and fuel with this tune. Oh, by the way, my 0-60 dropped from 4.20 to 3.94 based on the Aeroforce gauge.