"Nicely made, and makes the possibility of a grid switch to match other MK stuff work, so has to be good on that alone! One slight annoyance is that the terminal screws are covered by the frame when the switch is inserted. This means the terminals have to be tightened with switches separate, and when linked with 2.5mm cable it can be a struggle to get them in. Would still buy again, but MK could do with moving screws on 20A switch backward or making the frame a little thinner so screws can be accessed with it assembled. Another tiny annoyance is the captive screws to fit to the back box; if they are too short because the box is set too far back it takes a couple of minutes to destroy the captive washers to get the screws out to fit something longer."