I have purchased a bunch of Anderson fittings in the past year. Seems like boxes of them in different sizes and shapes. Generally I have found them to be remarkably good. Maybe not perfect, but certainly MORE than just "good enough".
I needed this NPT adaptor to fit up an over-pressure valve to some high pressure 3/8" tubing. It worked better than I could have hoped. The finish on the fitting is good and the threads are within specification for NPT. I have purchased several fittings this year where the NPT specification was NOT held, but NEVER an Anderson fitting. They always seem to line up and tighten down exactly like they should. This particular fitting is a pretty standard item. You can usually find them at the local "big-box" stores and some local hardware stores. Usually Anderson fittings are about the same price as those found at the other locations or maybe just a tad bit less expensive. AND I can get them delivered to my door so it saves me gas money too.!! I LIKE Anderson fittings. I have never received one that was outside of specification.
I won't comment on the makeup of the alloy here. I don't know if it is recommended for potable water use or not. Since that wasn't my application, I was not concerned with the specific alloy in use.
Once again I find myself recommending Anderson fittings. They are a respected U.S. company that manufactures a quality product at a decent price. You can't ask for more than that.