Pretty much no complaint. If you want to download HD video you have to download the audio and video separately, but it's super easy to combine them, you just look up "combine video audio tool" or something to that effect on Google and you'll find plenty of free sites that do it in like 20 seconds. You can also do it yourself on any simple video editor like Shotcut, you just drag and drop the audio over the video and it will 1:1 sync perfectly by default. I believe this extension does include a built-in tool to combine the audio and video but I forgot how to open it lol. I remember using it a few times when I first installed the extension though.