[dave5104]

Are you referring to the standalone $25/year iTunes Match subscription?

As an alternate data point, I've subscribed to that service for years now (no Apple Music streaming) and have not had any major problems. Lots of custom music tracks as well, which Match has always respected and synced properly across my iDevices.

The only problem I had when first signing up years back was that one of my songs was replaced with the wrong song--but that bad match has since been fixed.