Yes! I used to live in Bernal Heights in San Francisco and commute to SOMA everyday, and this is how my commute options broke down, time and money-wise:
Bike to BART, BART to Powell - 30 min, $1.75
Bike straight to work - 30 min, free
Bus to BART, BART to Powell - 30 minutes, $3.50 (I think?)
Bus to work - 45-60 minutes, $1.75
Bum a ride to work - 30-45 minutes, free
AND biking adds many non-quantifiable benefits, as the OP states. It's the best way to clear your mind, other than maybe a long walk or hike.
Bike to BART, BART to Powell - 30 min, $1.75
Bike straight to work - 30 min, free
Bus to BART, BART to Powell - 30 minutes, $3.50 (I think?)
Bus to work - 45-60 minutes, $1.75
Bum a ride to work - 30-45 minutes, free
AND biking adds many non-quantifiable benefits, as the OP states. It's the best way to clear your mind, other than maybe a long walk or hike.
[edit for formatting]