PluralEyes was definitely worth the investment when I was using Premiere. Now we use Resolve, which doesn’t have as good sync’ing methods particularly if your devices don’t all use timecode. As a solo videographer managing two DSLR cameras in separated locations, plus audio and no slate (not practical in this situation), AND each camera with rec time limits, I ended up a couple big gaps in my A camera (for a 1hr 40 min shoot). Audio was continuous, but Resolve couldn’t sync it. After a lot of frustration attempting to match waveforms, I imported everything into PluralEyes and exported to Premiere where I could either export each of the A and B cameras (as proxy to speed up the export) or mark the timecodes for each camera IN/OUT.
My production method was obviously flawed, resulting in more time in post attempting to fix it. But, I’m working alone with a Sony A7rII and Canon 5DmkIII, neither of which is a good production camera (although video quality is very nice). It was a favor shoot for a friend and it always helps to discover weaknesses in your system when it doesn’t matter so much.
Perhaps there was a better method in post, but the PluralEyes>Premiere proxy was the best idea I could come up with at the time (this morning after sleeping on it).