I had at least 20 flintlocks at one time. Locks from all different makers, cheap and well respected. To an extent, it is like a ford-chevy-dodge thing. But none of them run at racetracks unless tweaked and modified. Had a few older rifles and pistols with junky locks. Probably the most impressive for ease and speed, was a North Star lock from Curly Gostomski. Even stranger was the fact that I used the same flint in that gun for several seasons of small game and infrequent match shooting. That lock definitely did not eat flints.
Also had a cheap Indian flintlock pistol that had a light trigger pull and would light up the neighborhood when it sparked. The person that sold the gun, told me the lock had been tweaked by a gunsmith in Virginia. It showed.
Had L&R's Chamber's Silers, Davis, and a few Dixie, Spanish, Italian, German and Japanese locks. Never had an original in good enough shape to try. No matter which of the better locks folks recommend, they need tweaking to reach their best potential. The German flint pistol, works great for a production lock. Just that the aluminum lock plate is bizarre.
Another thing that many do not consider is the fit between the trigger and the lock sear. Had a two guns with single triggers that went off as lightly and easily as a set DST. On one the trigger was so light it would have been considered too light by many. Also had guns with good locks on which the triggers were slightly misplaced and even with double set triggers the locks were slower to be tripped. Might as well been a five pound trigger pull on a Spanish pistol.