Abraham, I can't speak specifically to the BCM charging handle as I have no experience with it, but I have experience with other charging handles than the original Mil-Spec, and I have found that they are generally superior. A good friend of mine recently ordered a complete upper from PSA, including BCG and charging handle. The charging handle was so crappy that the bolt got stuck in battery a couple of times while trying to manually cycle the action, because the charging handle simply wouldn't release so it could be drawn rearward. This is his first AR, and he was scared that it was a major issue. He brought the rifle over to my house last Saturday, and that is what I diagnosed. Shortly after, my son arrived, who is a gunsmith and builds custom ARs all day long, and he looked it over and came up with the same diagnosis.
So yes, a standard charging handle can be poorly made, and for what you pay for the upgraded charging handles, you not only get a better product mechanically, you also tend to get one that is better materially, and that has been more carefully assembled, with better quality control.
BCM's has a good reputation. Also, Rainier Arms has a proprietary design which is highly regarded. Both are considerably more expensive, but you do get what you pay for.