Oleg,
I purchased a new Mustang Pocketlite about three years ago. In fact, the Mustang was my first CCW pistol and it is still the pistol I carry most often. In all this time I've never had a malfunction. I keep a round in the chamber with the hammer down. (There is a firing pin safety.) I keep the magazine loaded with alternating rounds of Federal PD Hydra-Shoks and Glaser Blue's. The Pocketlite frame is very light, and the reason I carry the Hydra-Shok PD's is I hope the reduced recoil will be easier on the pistol. It's also a very accurate little carry pistol. Sometimes I do think about swapping out the plastic guide rod and trigger for stainless ones, but I've had no trouble with either.
I know some people who carry "cocked and locked", and they have had no trouble with that either.
I usually carry the Mustang in a M/D Enterprises BS-2. (GREAT concealment holster!) However, last week my wife surprised me with a small Galco waist pack. I've been using that for a few days, and I like it.
Hope this helps.
Will
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Mendacity is the system we live in.