I have been through all of them. Raptor, GHW and finally the Switchback. The Switchback is the best charging handle.
The Raptor was OK, but it stuck out too far and the the receiver wore the plastic enough that it did not want to lock back.
The GHW was better, but it started to wear the finish on the auminum receiver. I have a silver spot on my MSAR where the charging handle locks back.
The Raptor has two features that I like; First, It has a polymer wear pad that does not wear on the receiver, and the wear pad is replaceable.
Second, it has a large handle that folds out of the way automatically when not needed.
I have an MSAR and an AUG A3. Both of these rifles now wear a Switchback. They have been through several range sessions with reloads and malfunction drills. The Switchback performs very well. The folding feature is nice to have when firing aroung a left side barricade. The charging handle on a short bullpup tends to snag on a barricade. This was a problem with the Raptor (The Tavor charging handle has the same problem). A few times it pulled the bolt back and caused the bolt to unlock.