Snaplock Supply Question?

Looks like an expensive 2x2 but somehow worse?

Most of my face value coins I find in circulation just sit on my coin shelf, like 2009 cents and nickels, the 1776-1976 quarters, 1965 quarters, dollar coins, etc.

Anything more than circulated face value coins go in a 2x2, which is how the vast majority of my coins are stored. I highly recommend you bulk buy a bunch of 2x2s. Those will be how you store the majority of your coins (excluding proof and mint sets, keep those in their original holder and packaging)
2x2s are dirt cheap if you bulk buy them and they are good for storage. Just don't get them wet, or leave them in direct sunlight for extended periods of time. That goes with any coin regardless of how it is stored or holdered.

Now, for the very special coins, those over say 300$, you might want to get them in a 3rd party holder from one of the major grading companies (PCGS, NGC, ANACS, those things)

I wouldn't use those snaplocks. Maybe I'd pick an Air-Tite if I thought it's a pretty cool coin, but not really worth the fee to get it graded. Perhaps a 10th-ounce gold piece would go in one?

Anyway, I'd steer clear of those. You're talking 5$ for a holder, just the holder. No professional's opinion on the grade or authenticity, just an expensive holder. I don't see many of them, so I assume it's for a reason.

I've used 2x2 snaplocks for all of my single coins for over 30 years. I use either the Whitman or Edgar Marcus clear plastic 2x2s and have never used the Harris. I guess it depends upon whether or not you want the insert that Harris has.

If you decide to get the Harris snaplocks, you might want to shop around on the price though. It's strange that Wizard's price is $.865 ea in package of 6 and $1.1156 ea in box of 25. Usually bulk is cheaper

I've had good results with Jake's marketplace https://www.jakesmp.com/ You might want to check them out as well.

Just no real advantage over standard flips except taking up more room.