I've had three Kahrs. Of the three, the plastic framed Kahrs had some problems with cycling and overhand racks. My steel framed Kahr is 100%.
I've had two Ruger semi-auto products. The 22/45 had problems, VQ fixed them. So does the 10/22, but that is my build's fault, not Rugers (or VQ depending on how you see it).
I've had one S&W product; it had problems (986). I still love it and would now consider it reliable.
I've had one Springfield product; it had problems, but after 1,000's of rounds, and it is in current working condition. I'd consider XD's reliable over-all after my extensive experience with them as a type.
I've had one Browning product; I shot and abused 3 parts of a semi-auto rimfire into failure. Hundreds of failures in terms of cycling. It works very well now after 1,000s of rounds and after I sold it for a.... (I am still in touch with the owner.)
Sig Mosquito. 2-3 failure to feed per 10 round magazine with both spring systems with CCI Minimags.
I've had one Duramatic product; shot to failure after 1,000's of rounds.
I've shot one Beretta product; shooting several pins and a rear sight lose after 100's of rounds (1,000s?).
I've had one Rock River product. 1,000's of rounds with no failures, including regular hunting and a carbine class.
I've had one Arsenal product. 100's of rounds with many failures to feed, fire, and defects. Now in theoretically working condition.
I've had one EAA product, semi-auto 10mm variety. Several trips to factory, 2-4 failures to feed per magazine... possibly ammunition related.
I've shot many pump-action shotguns all with user-only induced errors for 1,000's of rounds.
A Walther PPQ that my ex-wife owned ran very well for 100's of rounds.
I've shot 1,000's of rounds out of bolt guns with a variety of wear or age induced errors.
Technically, my Kahr K9 and my Rock River are the most reliable guns I've had trigger extensive trigger time on. I've seen Glocks, 1911's of many stripes, and Diamond Backs choke in my presence, though I didn't put enough rounds through them to consider specific mention. Guns working completely reliably seems to be the exception rather than the rule to guns in general. I'd say it's more of whether you can manage the unreliability of any particular gun.
NOTE: This is the entirety of experience of guns I've "owned." I am cursed.