I have limited experience using transcription services. I've only used Google's service before, as offered through the Headliner App (if you're not familiar, it's a tool for making short videos for your podcast).

It's amazing based off what I can tell. I uploaded a 22 minute podcast I recorded, and I wanted to do 3 things: (1) Edit the transcript to make sure it was accurate, (2) Turn that transcript into a blog post, and (3) Turn the transcript into subtitles for a YouTube version of my episode.

It took about half an hour to do all of that. It was so, so simple. Highly recommend it.