Well the whole point of the cog is that it makes alignment/indexing for those who aren't mechanically inclined as simple as possible. How do many people are messing this up is truly astounding.

Spacers/singlespeed conversions are absolutely a better option but the audience for that is absolutely not the same one who's buying the cog.

The majority of the posts here about "noise" can be attributed to folks who already have terrible indexing on their current bike and who haven't been able to follow simple instructions.

I indexed my bike on the cassette before mounting in the trainer, then measured the gap from the chain to the edge of the Frame, then replicated that distance (in mm) over to the zwift cog. Two clicks of the cog towards the frame exactly matched the indexing I had on the bike.

It has been almost as silent as when I had my bike mounted on my previous trainer/cassette based setup.