Pros and cons of cycling to work and back 5 days a week?

I'd just like to set the record straight here by saying that :

a. I don't have a 4 x 4 car. I have a golf. it is small.
b. While i do go to Waitrose, i am unlikely to purchase swede there, as i have a veg box delivery.
c. i do like their stuffed vine leaves though, and their range of ale.

a. I don't have a car, so I win :p
b. I just cancelled my organic box delivery after years of good service, as they suddenly felt obliged to deliver at 5.40am, waking the toddler, and being unable to appreciate the logistics of property access on an inner-city council estate; and losing the ability to communicate effectively anymore :(
c. Waitrose treat their employees better than the other big players, but the range of ale is a bit shit at our local branch.