Young kid here,
I get bored easily with cars. I JBD'd mine and I still haven't gotten bored. My dealership doesn't care about having a tune in it. Had my EGR replaced once, and they literally took off the JBD, reprogrammed the ECU, and put it back on.
Mods: AEM Meth Injection, BDP downpipe, Wagner intercooler, Bilstien B12 Kit, M3 Control Arms, MB Quartz Kit/Alpine Amp
Best 1/4mi: 12.34s @ 111.88Mi/h