Made an appointment, drop the car, pick up the car the next day with good quality trusted service at a competitive price.

Outstanding. Dave and his team are great.

Great shop for Porsche service. 1. They scheduled the service visit so that they were ready and had the capacity to focus on my car when I brought it in. 2. As they were diagnosing the problem, they kept me aware of the findings. 3. Communication about the status was just right. 4. And the parts were ordered and repairs were finished promptly. All for a very fair price.

Dave Modderman has kept our Porsche's maintained and running like new for over 15 years. Outstanding!

Have had great experience with Modderman! I was impressed that there was discussion about maintenance that didn't result in extra service. Benefits and risks were discussed, and a more strategic plan on how to address the ongoing needs were decided on. Felt like I got clear advice and I was in good hands.

david and staff are class acts. Friendly and accommodating.

Over a few years now, I've trusted Dave and his crew on their advice/recommendations, workmanship and attention to detail, and I've never been disappointed.

I had an excellent experience working with Dave and his shop to resolve a very nagging and tricky check engine light issue on a '98 993. I tried two very reputable shops near San Mateo multiple times over 2 years and neither could resolve the problem without proposing expensive replacement of parts only in the hopes of solving the problem - nothing gauranteed. I even had one Porsche shop refuse to take my car because they didn't have the patience or interest in helping me out once they knew the issue. Dave and his team efficiently and inexpensively went about troubleshooting the problem in a smart experienced way and ultimately diagnosed and fixed the problem. I went to Dave because of his excellent Google reviews; his excellent reputation is spot on. I highly recommend Modderman Services. They know what they're doing.