Absolutely!

When I've seen people having problems with EZ connectors, I most often find that they have failed to put on lock-tite.

I think this is a MUST with them.

Most grub screws do a pretty good job at digging into the metal rod, making it immobile, so I've never had to try grinding a tiny bit of metal off, to form a flat spot, as a may do with axles.

On planes that I worry about possible slipping, I may add the second collet/collar for safety.

On pull-pull tail assemblies with the servo on the tail, I don't bother as if one were to slip, the other is there to hold the rudder for landing.... as in the following image...



I do periodically check for slop and tightness just to be safe.

Frankly the EZ-Connector is much stronger than the clevises on the rudder above.