This is an amazing app!! I had already been using Recastly for subtitles, but it didn't do transcripts, and the interface was clunky. I kind of resisted buying yet another subtitling app, but figured I would at least try it as the demo video looked interesting. And all I can say is... WOW!!!
I had a 6-minute video on YouTube that I had been meaning to transcribe, but hadn't gotten around to it (and I uploaded it two years ago!). I put the YouTube link into HappyScribe and it uploaded in less than a minute. I clicked the "transcription" button (without having done any customization or adding any vocabulary), and in a few minutes had the complete text. There were a few tweaks (and I don't blame it for not being able to transcribe my name!), and then I was able to download the transcript in any one of a dozen options, including PDF, TXT, and more.
Once that was done, I noticed the option to "convert to subtitles." Sure! And because I had already made my corrections in the transcript, the subtitles were error-free. And now I have my video with burned-in subtitles, and a PDF transcript! And this was, quite literally, just about ten minutes after I redeemed my AppSumo code.
This is going to be incredibly handy when I launch my podcast later this year. I only sprang for one code as I don't do much more than maybe an hour of video a month, but I might also go nuts and start captioning every video I've ever taken on my phone!!

I do have one question, though: Do the hours roll over from month to month?