I come here frequently on my lunch break from work, and it always provides a refreshing alternative to the typical Pizza, Burgers, fries, etc. that often become ubiquitous with office lunchtime.
They have about any type of Smoothie you can dream of, but I tend to stay conservative with my order as the price can jump in a hurry.
I normal small smoothie without any "added" supplements will run you just under $5.
Also, if you come here a lot, I've found it's smart to just buy yourself a gift card. With a $30 gift card purchase, you receive a free small smoothie on the spot.
The $30 card is conveniently divisible by 6 small smoothies, so you'll end up on top of this deal--as well as a provided incentive to come here, instead of the aforementioned greasy pizza alternative...especially if you're trying to lose a few LBs.