I haven't used it in San Francisco, but I use DC Uber all the time, and I too have had the same response. That said, I would expect most employees to say good

I haven't used it in San Francisco, but I use DC Uber all the time, and I too have had the same response. That said, I would expect most employees to say good things about their employers, even if that weren't the case. I know I personally wouldn't ever say anything negative about my employer, even though I personally haven't any cause to.