The SEPTA faregates are OK, but after you check in, you can't check out for 10 minutes or so. Once I checked into Jefferson Station, went to the track, and realized that it was off-hours and the trains were not running very frequently, so I thought I'd get to 30th St. faster on the Market-Frankford Line. However, my Key Card wouldn't get me out of the faregates. Fortunately, there was an attendant that let me out, and also, fortunately, the Key Card worked fine for the Market Frankford Line. Another time, I was taking a Cynwyd Local that was leaving from Track 7. It turns out that Tracks 5-7 at Suburban Station (at least in section A) are completely separated from the fare gated section for tracks 1-4, which most trains use. Thus, you have to exit the fare gated area and immediately re-enter another fare gated area to access those tracks. This cannot be done with a key car, you have to have the attendant use their special card to let you out and let you in. Fortunately, there was no fare gate at Cynwyd.