HIGHLY stressful. As with any 'sales' job, you have numbers to hit.
Starting salary at $30k is hard to live on, and it can take you a while to have a livable salary, especially if you're an account manager.
Long hours and terrible work/life balance. Right now it's not crazy to work 8am-6pm on a daily basis with no OT pay for Account Managers since they're salary.
You can go from recruiter to account manager (which isn't even really a promotion) but other than that there's no real room for growth.
Mandatory 1 hour lunch. If you work through lunch, which most AM's do, you're out of luck. Would be nice to be able to leave an hour early and work through lunch.
Stuff that would happen with any staffing agency, but wanted to include it so you know what you're getting into:
Nothing is in your hands except how many calls you make. If people don't answer/call back, if someone is interested, if someone shows up for the interview, how they present themselves at the interview, if they get an offer, if they accept the job, if they give you a hard time during onboarding, if they perform well at their job, if they unexpectedly quit/get fired, if a manager sticks to their word/timelines. It's all out of your hands. So be prepared to not be able to influence your success much. We just do what we can to minimize situations above going bad, but at the end of the day have no control.
Be prepared to be on the phone all day every day. It can get old.