New E39 M5 owner here, but definitely not a new BMW enthusiast. After a lot of research, I decided to splurge on an Slimmbones front lip. It seems to be the best looking front lip and highly reviewed.
After purchase, there was a week long delay in the lip being shipped out. I emailed Slimmbones about it, and found out one of their "key" employees had a stroke, so they closed to care for them. That's understandable, but seems as a business, there should be some backup plan.
Lip arrives, and I excitedly open it...only to find that there's no instructions, no hardware, no pre-drilled mounting holes, and worst of all...the quality is awful. There are chunks of rubber on there left from the mold process, the finish is awful, and the lip is completely warped from the flimsy packaging. I've received cheap eBay parts from Taiwan that are much better quality without being $300.
I guess I just expected more for $300...instead, I got a really poor quality piece of rubber that didn't even have mounting holes in it. I've emailed Slimmbones about this, and I hope they make it right.
Look at this thing...