Very impressed by this establishment. Giovanni will: (1) charge extremely competitive prices, (2) be honest when helping you evaluate your options, and (3) provide excellent customer service and probably throw in something complimentary, especially if you're having a bad day. He has enough loyal customers to keep his workshop full, and he clearly values his reputation and customer relationships more than any one-off profits he can gain. As someone who went to business school, I'd say Giovanni definitely has his business priorities straight. I have a 2001 Mercedes that's been with me since college, and last weekend I experienced some slippage issues with my transmission. After quick searches on AAA and Yelp, I decided to take my car to ISM because of their AAA affiliation, good Yelp reviews, Saturday hours (10am-3pm, plus 24/7 phone reception), location (SoMa, less than a mile from where I live in downtown SF), and specialization in European cars. Giovanni gave me a quote on the preliminary transmission diagnostic that was below market average, and in the end he charged me HALF of what he quoted me. This is unheard of. Giovanni also emailed me the full STAR diagnostic report in PDF form - something most auto shops are reluctant to do in case you decide to take the information and your business elsewhere. Moreover, Giovanni was honest and candid with his recommendations and walked me through several possible cost scenarios (e.g., replacing the conductor plates vs. replacing the entire transmission, whether he thought the fix would last / was worth it, etc.). He was very professional in his advisory role and at no point did he slip into a sales role. He did not pressure me to make a decision; he simply asked me to call him back when I was ready. He was also very gracious with holding my car in his garage as a complimentary service while I took a few days to figure out what to do. In the end, I decided not to bother fixing this car -- keeping a car in the city is honestly more of a liability for me than anything else, what with parking, congestion, and all the speeding/parking/miscellaneous traffic tickets I keep getting. When I do get my next car, however, I will definitely be back. This place gives off such a cozy, small-town, mom-and-pop feel -- makes me want to go back and bring them some cupcakes and cookies, LOL.