I've had it for over 4 years I think, from before my daughter was born and from when my Mother-in-Law used to stay in the guest house.
Today I dug out the box and installed it. It was easy, not quite straightforward but nothing complicated. Put some caulk around the top and sides to try and keep any rain out. Now hopefully I need to be awake when it's dark to go try it, with the sun coming up at 5 and going down at 9 it's hard to find a good time to test it.
