Pros
People here are generally pretty smart and nice. Not as much posturing/politics as I've seen in startups I've worked in the past. Ethos is also more transparent than companies I've been at in the past, all dashboards, sales metrics, etc are openly visible versus only accessible my management.
Cons
Standard growth-stage startup problems. A lot of hiring going on, so people don't know each other and step over each other's toes when trying to get stuff done. Systems are stitched together with crazy manual processes. Priorities shift around quickly, sometimes without context or background. Nothing out of the ordinary though -- this is my third startup so I'm kind of used to it but I can tell some other folks struggle in this kind of environment.