Took it daily for 5 years to and from the financial district with no issue (Only issue was the BART strike which lasted a few days around 2014 I believe). Hadn't taken it for a couple of years but got back from SFO recently and it was a smooth ride to El Cerrito Del Norte..got off and the 72 AC transit line was outside of the station waiting for me :). I got to use the same clipper card to easily board the bus (During my trip where I visited three different Asian countries, I constantly felt I was being scammed by local taxi drivers because I was a foreigner. It was so frustrating. I did visit one city which had decent public transport but I was constantly waiting in line buying tokens to ride the train. You had to buy new tokens even when switching to a different line on the same trip).