If you have a good view of the northern sky, it will work...even if the fussy app says "move to a better location". My app say, no way, Jose, but the installer used his mo-better instrument and said it would work. I installed it in about an hour, but that was with good attic access to run the cable.
Mine worked great the first winter with no leaves. Once spring hit I was dead in the water. I wish I could have used it more, but I wasn't loosing all my trees to make it work.