"Has taken me a little while to make the move to these boxes but they are genuinely time savers and make life much easier. They are more expensive than traditional screw terminal jbs but are well worth it. Connections are made outside the box with push fit or cage clamp connectors and then slot into the box - the cable grips take effect when the lid is snapped shut."
"if you use wago connectors then these are fantastic, they have an intergrated cable grip and are very easy to use, screwfix are by far the cheapest to buy these from if you can use all 10 boxes, i use to pay between £1.70-2.20 per box. would definatly recommend if you use wago fittings. you can also buy a pack of brackets to hang/hold these, 10 are about £1.20.... well worth the money"