"Altogether I think this is a pretty poor effort, with very little thought going into its design and even less into its construction.
Regarding the design, the problem is that the supply terminals are at the BOTTOM of the switch, whereas the Load terminals are at the TOP. This is opposite to pretty much all installations and so the wiring in the back box becomes a mess of crossing wires, not so easy when you're dealing with 6mm T&E. It's particularly a problem when you're replacing an existing switch which is the right way round, as the cables will not always be long enough. A really basic design error which by itself means that you should NOT BUY this product.
Secondly regarding the construction, the switch part is extremely flimsy in comparison to a decent quality product. Also the neon connection is very flimsy and in the unit that I had it was totally intermittent.
Given all of the above I took the one I had purchased back and exchanged it for a MK unit (15973) which was, as expected, excellent in all respects."