Product review (5 stars): Well built, accurate, and cheap enough to get it replaced if you break it/loose it.
I used this while traveling in the Caribbean, last time I went winter camping, and now I'm using it in my small indoor greenhouse. It's worked great every time. The only thing worth noting is that placement is everything. Things like being face down with the sensors in direct sunlight or having it magnetized to very cold surface will significantly impact the readings.