I've got a Barnes lower and a Tactical Innovations lower that both have that feature. Very nice to have.I use them on two lowers. Both pretty good but the wedge tightens them up. Took a bit to get a good takedown technique working.
I do like the M4E1 lowers with the poly tipped screw. There are billet lowers that have that feature as well. Nice to have.
I had exactly the same experience about 15 years ago. I threw mine in the trash and never looked back.I tried one once because I was at a gun show and saw a few so I grabbed a couple. Didn’t affect the accuracy of this particular rifle, and tightened up any slop, but made the rear take down pin a huge pain in the ass to push out.