I will only be watching on my PC, no other methods. Watching things without subtitles is a chore I can do without. With that in mind have they sorted out their woeful lack of subtitles yet? Last year I got the free trial, just to wach Game of Thrones. It was an unpleasant experience without subtitles, which they didn't offer at all on the PC. Has this been improved yet? Do shows hat I stream on the PC have subtitles?
I don't use a PC or Mac to watch nowtv with, otherwise i would have double checked your question, but according to this linked help article (which i assume is up to date) states PC's or Mac's still doesn't support subtitles.