Pros
You'll notice right away that most of the people working at Ansira are super smart. Though motivation levels will vary, it's great to be around people who know their stuff. You will most likely be adding some household name brands of Fortune 500 companies to your portfolio. Clients run a wide range of industries so there's the potential to gain a lot of solid experience in those industries. Depending on which team you're on and in which office, your work/life balance might be pretty decent.
Cons
In a number of teams and pretty much across the board in the Dallas North office (Addison, not Dallas) the work life balance is terrible. This is an ad agency, you can't expect it to be easy, but the workload here can be beyond impossible. Senior management seems to either be fixated on small things OR be thinking way too far into the future which leaves them blind as to how to manage the agency as it is now. For some teams, especially the accounts teams, pay is below average for other agencies in the area. Benefits are decent (not great but decent), but any employee activities are lackluster and half-hearted. There's a feeling of not having the desire, time or money to invest in employees.