Product review (4 stars): functionality: great.  interface: eh?
the good: it works like it was designed by an electrical engineer.
the bad: the design and form works like it was designed by an electrical engineer.
recommendation: buy it.

bought this (with some 51140 receivers) for a basement home office to control some lamps plugged into unswitched outlets.  within 15 minutes I had it all configured on the same channel & home code via little switches, and the transmitter attached (included screws, my anchors) to the wall where a switch should be.  works great, with a soft click from each receiver.  nice.

although the documentation and description implies that you would use one transmitter to control multiple sets of receivers ("Control up to eight areas of your home lighting by selecting different channels") the little channel selection dial would suggest otherwise.  I have a difficult time reading the channel numbers around the dial in anything but bright light, and I almost tore a fingernail trying to turn that thing.  it's pretty tight (did I mention it's also little?).  fortunately for me, I'll leave it where it is, but it is obviously not _designed_ to be used frequently, whatever their claim.  additionally, the rocker switch feels sturdy, however it doesn't protrude much from the faceplate and takes a little aim to hit in the dark.

I'd recommend this product unless you intend to use it to control multiple areas/channels, and want to switch between them frequently.