-There's little to no advancement in this job. If you're looking for something where you can advance and it will mean anything outside of this job, look elsewhere. You only get to move up if you're liked by management and nearly perfect in all your measurable metrics, though I've also had them deny friends interviews based on things like, "You don't smile enough when at work."
-Because this job is so obscure, it doesn't translate well to any other field. I've worked here four years and in trying to job search now it's effectively like I haven't had a job for the last four years because no one outside of this job gets how it works. (And we're also not allowed to talk about how it works.) My advice would be to not work here for more than a year if you absolutely have to.
-For how easy the actual task of captioning is, call content is killer. I've seen other people mention not to work here if you are easily emotionally hurt and I am going to echo that here. The 'support' they offer is little more than being able to say, "A call was hard for me to hear" (you can't talk about what's in the calls) and they tell you "Take five minutes off calls." The content can cover anything from abuse to worse, you'll hear people crying, screaming at each other, talking about terrible things that happened to people they know, etc. And if you're someone who is in a vulnerable position in your own life you will hear plenty of people who will make you hate them because they will talk about the groups or types of people they hate.
-You will grow to hate hearing people breathe, eat, drive, cook, etc., because they do it loudly in the back of calls because nearly none of our customers, and only a smattering of the people they talk to, know you as a captioner exist, and as such no one has any regard for background noise.
-This one is important so I will put it in all caps: NONE OF THE MANAGMENT HERE CAN WRITE LETTERS OF RECOMMENDATION OR TALK TO A FUTURE EMPLOYER ABOUT THE WORK YOU DID OR WHO YOU ARE. I've held multiple jobs and this is the first time I've ever run into this. For some people who just want to skate by, this could be really nice. No one will know if you were late a lot, or stunk at the weekly test calls as long as your metrics are good enough to stay employed. But you also should not put a lot of effort into this job because it doesn't matter. No one outside of CC will know, ever, because they CANNOT EVEN WRITE A LETTER TO RECOMMEND YOU VOLUNTEER SOMEWHERE.
-If you go FT, your pay drops $0.60. Their reasoning for this is "We're giving you benefits" but even if you don't take their benefits your pay still decreases. This is really frustrating because the pay raises are infuriatingly slow. For example, after working here three and a half years, I had gone from making $11.60/hour to $12.23/hour. After going full time I now make $11.63 an hour, only $0.03 more than when I started four years ago, which honestly feels insulting.
-The longer you are here the more you will feel like this company doesn't care about you, and you'd be right.
-You have little to no interaction with your coworkers because this job is a cubicle farm where you are encouraged to sit and only look at your screen your entire shift. You spend breaks recovering from the call content and the absolute lack of time between calls and you may not want to talk to anyone.
-On busy days, Monday especially, you will have nearly no time between calls during "Peak Hours" which is around 10am to 7:30pm. This is a strain and if you work these hours during a M-F timeframe, expect to be really burnt out after work.
-You can't find a seat usually during 10am-4pm. You have to get one of the managers to move some other poor saps stuff or sit at a manager's desk for a bit.
-Probably about a fifth of the chairs are broken in one way or another. Rather than fixing them or buying new ones the company has put a lot of money into retiling the floor which didn't need to be done.