I've only stopped in once but my mango smoothie was delicious. I met with a client here during the work day and the downside was that moms brought groups of kids in and it got super noisy. It's great that Happy Cup has Foosball and board games to play. It just may not be the best place to do business or seek some peace and quiet. It's a small venue so I'll likely grab a beverage and go the next time.
I definitely recommend that you support this small business.