Pros
Like with every company, it can depend on which department you work in, your background, your personality, and other factors. However, for me, Compass has been a great place to work. The executive team has been changing quite a bit and that could lead to some internal changes as I have experienced at other companies, but only for the better in this case. Work-life balance is great, they really do mean it when they say they want you to take your vacation time (and a generous amount of it at that), each team is pretty close especially with this being an open office environment, but the office (HQ at least) has a ton of conference rooms, phone rooms, and couch/common areas to go work in if you don't want to be tied to your desk. Executives really do make an effort to listen to employees, whether it be at All Staff meetings, department meetings, luncheons, or directly. Now regarding the Work-Life balance, it does mean you put everything you've got in to that 8 hour or so day. You will be busy and productive, there are a good deal of meetings (which could be reduced a bit IMO), everyone is pretty connected or online whether via email or Slack, and many people opt in to the Work From Home option occasionally. The company is growing, but not at a crazy pace, the work events are pretty fun, and free lunch is a true perk. Overall, it's a start up but it doesn't feel like a cult-y start up if that makes sense.
Cons
More health insurance options would be great.