Received mine (target version) last April. Closing in on the 1,000 round mark.
Changed out the hooded front sight to a blade (for Rondies and hunting) and replaced the ramrod with a more substantial tapered hickory rod.
Settled on a .530 ball, drill patch and 80gr FFFg Goex for my "everything" load. Spit patching I can shoot without wiping.
Hunting I use olive oil for lube. First shot POI from a cold clean barrel is 1/2" higher at 50 yds than from a fouled barrel.
Shot these 50 and 100 yd groups during initial sight adjustment with the fixed and flip up sights. Have repeated the groups often enough to know it's not a fluke.
Get about 80 shots per flint, sometimes more.
Lock is well polished, trigger has a slight bit of creep before it lets off.
As stated its heavy at 10lbs, but hangs well in offhand competition. Definately need a sling when out mule deer hunting.
Nock breech is easy enough to clean.
There were some small flaws in the browning near one of the ramrod pipes. Inletting and checkering are good, with some small gaps at "points" like the end of the tang.
Have played with the peep sight enough to get it centered at 100 yds, but haven't gotten serious with it yet.
Didn't get a deer last fall, hoping to get a bear this spring.