I have been bowhunting for more than 20 years, and the Tetra 4 pin from HHA Sport is the first adjustable sight I have had. The setup process was easy, and after getting my "number," I slapped the tape on and without double checking walked back to 92 yards and had five arrows inside 13 inches.
The adjustable fiber optic hood thing works fine. I see it as a weak point but haven't had any issues with it.