I really don't see why they add sugar in the stuff. Peanut butter already tastes naturally sweet to me.
Palm oil is healthy (better than many of the so-called "healthy" oils like canola), but obviously there are various qualities of it. I like to add high quality coconut oil to my natural peanut butter. It's a really delicious combination.
Peanut butter is a great source of arginine. However, don't eat LOTS of it. It is a source of a mold that produces the carcinogen aflatoxin. Whatever, you do, make sure it is roasted peanut butter. As HEALTHY as it might seem, grinding the peanuts in the store fresh (unroasted) is not as safe. At least that is my understanding.
There was a previous discussion of this on T-Nation and one knowledgeable person argued that organic peanut butters tend to have MORE aflatoxin than non-organic. I have since read it in other sources (which doesn't of course make it so). I can't remember the argument but at I recall at the time thinking it was plausible. I don't know if this is true, but it would be worth checking out.