Depends on if you can stay neutral
The job itself is interesting, and the training process takes a lot of time but for good reason, because learning and mastering the skill of live captioning is difficult.
The worst part of the job is the content. If you hate news and the current state of things, steer clear of this job because you will be forced to watch pretty much nothing but news-related programs that focus mostly on politics. They mention in the ads the fact that most of the content is news-related, though, so it should not be a surprise. But stay away if this stuff stresses you out. Sports and other programs aren't available to new captioners for at least a year, after a lot of experience.
Nice co-workers, relaxed atmosphere, lots of vacation time
News-content, mediocre pay and expensive benefits