Product review (4 stars): Great thermometer!
Works great.  I have had to change batteries more often than expected.  I especially like the mounting.  It can just be hung on a nail and easily removed for battery changes.  My outdoor unit hangs on a tree. My previous outdoor unit had a hole that slid over a screw or nail head.  Well, the tree kept growing and I would occasionally have to remove the unit, which was difficult, and loosen the screw because the tree had grown around the screw head.  This unit eliminates that problem for me.