Vantaggi
Seniors are kind, very real, caring, lots of advice and always approachable. Juniors are enthusiastic, eager to learn, lots of chatter: really brings the company together. There's no drama in the workplace, everyone's nice and friendly enough to hang out after work (a healthy amount). Wide range of accounts. Performance and capabilities wise would say they're at their peak, plenty of talents in the company. People are eager to grind. If you have a good manager that can speak up for you, it's easier to rotate accounts and grow more.
Svantaggi
Sometimes long hours, and always chasing for new business, but such is agency life - if this deters you, you should not join an agency at all. Sometimes people here can be too kind, it is a thing.