I have settled into two charging handles the Radian Raptor and Zev.
I tried the Radian first it’s super comfortable in the hand using both and over hand grip and a bladed hand from the right and left. I think the basic all metal version is the best. The LT has plastic handles, the SD just seems like they added voodoo cuts, and the slim handles I find less ergonomic.
The Zev handle differs from the Radian as the handles don’t actuate. The fastening clip itself is what is spring loaded to hold to the upper. In this design the handles and charging bar are a single solid piece which I think improves overall durability. However coming from a Radian or other design where the handles actuate make this feel a bit odd in the hand - nothing moves you just have to jerk it.
I think both of these designs are much better than the Mil-spec design for quick ambidextrous use. Are they worth up to $100 - probably not. But it was worth it to me to get the base models.