I haven't bothered with it I've put 20k miles since I got the car and who knows how long it had been before that. Tire wear is even so I decided it wasn't worth it. Just my experience so far if you think it's worth it then you should.
2006 BMW 325i Titanium Silver
Mods- 19" AG M310's hypersilver, LCI xenons, drilled and slotted rotors, OEM rear spoiler, OEM exhaust tips, brushed black interior trim, Viper 5904 alarm + remote start
Audio upgrades- Alpine S920HD, JL XD600/6, Jehnert XE200, Morel Hybrid Ovation II, Audioque 2200D, 2 Alpine SWR 12d4's (forward facing sealed from trunk)