Hi R.J.
My only experience with shooting the snaphaunce lock is with an original Moroccan lock. These original locks take quite a bit of re-working to get them to operate reliably. But I'm confident the English style lock from TRS - if assembled correctly - will function better.
The most noticeable is the longer timing of ignition. I'm sure this is primarily due to the long throw of the cock. And you have both a battery and pan cover being pushed forward at the same time, etc. Lots of nomenclature happening after you pull the trigger. LOL
I had to keep in mind that the original design of this lock goes back to the late 16th Century. In fact, it seems that the ignition timing of the wheellock is a bit faster. LOL I can readily see why the adoption of what we call the true French developed flintlock with it's vertical sear was so quickly accepted.
The guy in the YouTube Link above I believe is a Forum member and could probably give you a better opinion.
But in my opinion, the snaphaunce is no where near as reliable as a Siler type flintlock being made today.
That said, the earlier 17th Century guns are a blast to shoot.
Rick