Kevin M.
That's what I mostly use it for. I often have to adjust the captions because network standards and practices decide that words have different meanings every other day. In rap videos it's constant. Most of the time however I have to deliver a ProRes Mov with captions, which we can not currently do. If I am uploading to DMDS they can take the MXF file that does work. When it comes to captions we just have to be prepared to send anything out.
Kevin