Pros
Very high quality engineering team. World class execs who have been around the block with a great founder/CEO at the helm. Execs also handle difficult situations with great integrity.
VP of Eng Wade Chambers is great at developing engineers and engineering leaders.
Company on path to becoming big, but has potential to be worth multiple billions. It's exciting to be part of small team that has generated massive amounts of value for customers, and can shape the path of this company's future - whether we're $XXXM or $XB or $XXB.
Cons
Small team means each engineer owns significant chunk of the system so it can be high pressure sometimes especially when things don't work, or when it's crunch time (i.e. holiday season). Carrying pager is not very fun, altho the team tries hard to make sure bad pager rotations are exception not norm.
Commuting from SF takes 20 - 40 min depending on traffic. Mean prob around 27 min. If you live near Caltrain you can use the company's free Caltrain passes.