I have 4 watches with this movement, and can confirm the 50% reliability claim.
They are as follows:
TM0915 - Blue dial, cheap alloy case, not sapphire, reliable to +10s/day
AM0184 - Black dial - A bit of glue residue under crystal, sapphire, reliable to -4.7s/day
AM0184 - Silver dial - Clean watch and strap but - Dead on arrival
AM0239 - Rose gold with cream dial and sapphire- lovely looking watch but stuttering seconds hand and +30s/day in limited testing.
All in all no more Starkings for me until they fix the QC issues.
Yeah, it's weird, as the movements do generally look to be finished better than the average 2813, but just have this little flaw now and then of the poorly finished seconds pinion gear, and some movements are quitting due to swarf/roughness of some edges here and there on the plates or gears.
Mostly, when one comes DOA, and you open it and push the first or second gear it will run and keep running. Or worst case you remove the balance and pallet fork and let the whole gear train run freely for a few good runs, then it'll run smoothly and keeps running just fine. A little whiff of aird duster through it to remove any possible debris or swarf...
I've not had one that would just never run again, and once I got them running they kept running, not a single one failed again after a while, and I've bought more than ten, of which some became gifts, some used for the movement to make a build, some still in the original state.
As for the stutter, if you remove the seconds hand, and the upper bridge of the movement, then pull out the seconds pinion, apply a tiny blob of grease on the shaft and push it back, making sure the gear is remaining dry. Then the stutter will disappear, sacrificing just a bit of amplitude. These are very strong runners though, and where I needed to do this the movements still were in the 270-280 degrees amplitude range. The grease just makes sure the seconds hand will be stabilized. This results in a very smooth running seconds hand. I'm using a synthetic grease for this, so it will not run dry over short time.
Got this back on wrist and worn it during my normal routine for 10 days.
Brushed lugs match brushed metalwork on one of my MKS straps as a bonus.
Great timekeeping results as you can see below, and more motivation to get my other Starkings revived.
I've giften one to my uncle, and even though it ran, and his greatest pet pieve was the spinning noisy rotor from time to time, I've retrofitted it with a 2836-2. The hands fitted right on, the date ligned up right away. I must say, it felt like an upgrade, even though it cost almost double the value of the watch.