I've got the South Bend 3850 CB 12 puck, and daily drive it without problems (or did, until fuel prices shot up). I've had no problems with pedal pressure, and actually it doesn't even feel heavy anymore after getting used to it.
Stop and go traffic is slightly cumbersome, but just something you deal with. It it starts lurching backing up, I've found revving slightly to 1,000 rpm or helps a bunch.
--Eric