I've had at least four, IIRC, since they were introduced. Just fun little guns. Mine have all been very accurate and reliable. I've used the factory iron sights, a red dot, and have a Redfield 4X scope on my current Camp 9. I plink out to 100 yards with it. I have tried all kinds of ammo in them over the last ~30 years, reloads, std pressure, +P, +P+, different bullet weights and shapes, etc. Since my first couple, bought new, I always check that buffer and have used the Wolff 21# recoil spring in my Camp 9s for years. I knew thay made some Camp 9Ns with a kind of brushed nickel factory finish but had never actually seen one until I came across one in a Cabelas used rack about 4 years ago. It was in mint condition and very reasonably priced. I don't think I let go of it till I initiated the buying process. The buffer in this one looked almost new, but I replaced it anyway. The original buffer crumbled as I removed it. Glad I never fired a shot out of it until the buffer and recoil spring were replaced. Anyway it's been a fun, reliable and accurate gun just like the others were. At the prices I'm seeing on clean examples now days, I think I'll try to hang on to this one....
PS, the original Marlin magazines, along with the S&W 5900 and 6900 series magazines, have all worked fine in my guns.