Pros
So my title is, the workload is incredible. This can be literally taken both ways. In my department there is a wide range of work to be done and much of it is fairly enjoyable, with a few tasks so frustrating that slamming your fingers in a drawer would be less painful. But in general, the baseline work is ok. Your clients are generally very pleasant to work with and helping them get live with their products is rewarding. Depending on your manager, you may have a wonderful internal experience as well.
Cons
The con is, the workload is incredible. I'm talking about having hundreds and hundreds of accounts piling up, in addition to new sales needing their stuff RIGHT NOW, and product updates coming out so quickly you'd swear the last batch of new features came out only a month ago. They probably did! This means your supporting job workflows are quickly out of date, and you have no documentation on what to do, or updated documentation to hand out to your clients. The department I'm part of, and lets be honest, most departments at this company are vastly, vastly understaffed. It's a bad cycle, you may have 10 people but need 30 people. Those 10 people doing the work of several can't take it and leave. Repeatedly. You may receive emails every few months of all the people leaving. They want people to stay, naturally, but who wants to do the work of 2, or 3, or more people, all day, every day? Through your lunch, or even at night, and on weekends? And depending on your manager, you may not have a good time, at all. Might get told you should feel stressed, that the CEO himself doesn't want to hear about the departments terrible numbers, or blustered one way or another.