Works great
We bought this product to control a flourescent light fixture in my husband's workshop which is in a covered patio area outside. The switch works great, exactly as promised. The nice thing was that Amazon would ship this to our location which is in Puerto Rico, & they won't ship many electronic items here, so if you live in a hard-to-ship-to area, this may be your best solution. The remote works from a good distance away & we hung the unit upside down as per instructions - also a good idea if you mount it outside so water doesn't get inside. Now we can turn the light on/off from inside the house. I heartily recommend this product.

A fine product
I inserted the unit in a waterproof box behind a masonry wall. It works consistently at about 50 feet. I wanted it to work at 75 feet (which would bring it into the house), but it consistently does not. Not bad--and I really didn't expect it to work through the box and wall--but not as perfect as I would have liked.

I am ordering 2 more.
We love this remote. We are using it for outside lights and it works from inside the house also. I am ordering 2 more for the other lights.

Durable, high quality and great value
I own four of these remote lighting/appliance controls and now would not even consider another brand. They're obviously rugged and well-constructed and have proven themselves in my home for over a year of daily use. The one downside is that there are only two frequencies sold and it's a 'Forrest Gump' proposition ("you never know what you're gonna get"). Otherwise, I would highly recommend it.

UPDATE
I must update my previous review with new info.

First, I ripped open the second receiver and could find no reason to mount it vertically except for the ferite antenna which is mounted horizontally in the box, Radio range may be to only reason that they said it must be mounted vertically. I found no internal device that would cause problems if mounted differently than they recommend. But I'd rather hear that from the manufacturer, yes?

Secondly, the second transmitter DID NOT WORK WITH THE FIRST RECEIVER!

So, they must have different frequencies available, albiet unpublished.

An early poster stated that both of his were on the same frequency. My two are different.

So pay your money and take your chances, yes?