Just to add fuel to the fire... I started using wagos about three years ago for certain applications. I use them exclusively for lay in fixtures (along with Arlinington snap in MC connectors). It really speeds the up the process when your installing several hundred lights. My cost is about the same for a red wire nut but time is the big factor....(more fuel) since we are pretwist company.

The have come in handy to when doing device change outs and the previous electrician has left too little conductor in the box to work with and there's no way to repull.

Now dont get me wrong, I still prefer the wire nut. BUT i do feel these connectors have a spot in our world.