^I have 3 Dinan shops local to me, 2 of which are inside BMW dealerships.
I've had a HPFP and an injector bank replaced under warranty and have had no problems at all. My SA is a great guy, and there is where the answer lies!
As a follow up to the S3 package, the car has really impressed me and I cannot be happier with my results. I have no problem recommending it to anyone reading this and even more so if you are on the Dinan up grade pathway. It's been a bigger jump than I was expecting!