I've never used these 'Wago' connectors. I also never realized that's what they were called. To me, if it's not broke don't fix it. Making up a good splice is what seperates professionals from the amateurs and I certainly consider myself a professional.
As far as the stab-locks go... well, lets just say I prefer to not use them. I understand that they're UL approved. Big deal. They come lose over time especially in a room with a wooden floor with a 6-year old jumping all over the place. The better install BY FAR is to secure the wire to the terminal.
