To start off with audio since that was a complaint I saw a lot of:
My audio on OBS is already split completely so I didn't have any issues there. I wanted to be able to record my gameplay separately, and since I dual-PC stream I use a capture card to record/stream. The audio source is within the same folder as my capture card capture, so I just set Source Record on the folder itself and it records both the audio and the gameplay with no issues. With that in mind, I also record everything normally and it works very well. The gameplay audio is with both recordings with no issues.
The only thing that I'd really like to see is to allow for transparent recordings as that is pretty vital if I were to record other sources besides gameplay. Greenscreening has its limits, unfortunately.
That being said, for what the plugin does offer, I give it 5 stars. No issues so far whatsoever and it's really made editing videos (especially with a lot of cutscenes) a lot nicer to edit since I can have only the gameplay visible at any time.
Yes the start time can be added and also muting. I can't give a specific time tho' as there are projects in progress. Just watch for the update alert.