I've had good luck with both my 365 and 365 XL, over 4000rds
(about 3000 through the 365 and 1300 on the XL) between both
with 0 malfunctions, 1/2 dozen mixed ball, HST's, Gold Dots, Golden Sabers...
all have feed, fired ejected, I had one failure to lock back on last round
with a brand new mag with the 365, that it, they've proven reliable and accurate.
They've had problems early on and these are the first Sig's I've owned
in over 40 years of shooting, I'm no Sig fan boy and think their beta testing
way of business sucks but, I did a lot of homework and waited until it seemed
most of the bugs were worked out, the guns offered what I was looking for,
most accounts seem that customer service is good and quick.
I got the XL thinking I wanted to try a RDS, got sick of waiting for the ZERO to
hit the market, more Sig bullshit so I picked up a Shield SMSc from Springfield
Armory just a few weeks before Holosun announced the 507K coming out.
All and all I'm very satisfied with the 365's and the SMSc is working out fine,
actually very well and I see having a CZ milled pretty soon but I'll likely pick up
a 507K to replace the SMS once they've proven to tow the line.
I've pretty much resigned the 365 for rare days that I have to pocket carry
and carry the XL AIWB 12-15 hrs a day 7 days a week. although the 365 with 12rd
mag will surfice for another week or two so I can run another couple hundred rds
with the RD with a bunch of dry fire.