Ran mine the other day too, I,ve got the SR1 in my X6 and the SR1+ in my X5.
I totally agree with Dan, they are super smooth and deliver bags of power when you want it.
I left mine set as per factory settings and haven't had a good fiddle with them yet, but there are loads of features and Its nice and simple to set up and use.
I'm over the moon with mine
