Been using these for a good few years now, utterly indespensible. Working on light fittings at the top of a ladder - now screwdriver free, just a pair of wire stripper/cutters and job done in no time, non of those tiny flippin screws to lose / drop to the floor.
They have just brought out a 6mm sq version for high loadings.
Their junction boxes are flippin good as well, and, if you have to use / replace those old 4 way bakalite boxes - these are a lifetime replacement and can be sealed permanently, where the screw (bakelite) version is required to have periodic maintainance to check correct tightness of screws.
If you check their website, you will find din rail versions which could prove very useful for some projects.
Beware - there are a few knock off's around, blatant copies, claiming all sorts of amperage. Dont go there - stick with Wago.