A number of years ago, just before we took off on our boat to Alaska, Mexico and Hawaii, "Practical Sailor" did a radar reflector test and did have good things to say about the inexpensive, gold-colored, Davis "emergency" radar reflector. We put one on our boat and it seemed to work well as a number of times commercial vessels called us by referencing our location. At one point we were traveling with another, radar-equipted boat in Mexico at night and did our own test. At the start were seen on their radar until we removed the inexpensive Davis radar reflector and carried it below deck . The observing boat could tell as soon as the reflector was below deck when we disappeared from their radar screen. As soon as we brought it into the open, we reappeared on their radar. By the "Practical Sailor" test, the Davis unit far out performed the "Blipper" a more complex unit that pitched the multiple reflective surfaces contained in their cylinder full of "crushed" foil. By the way, the "Practical Sailor" test found that that the most effective way to deploy the Davis unit was the use it in the "catch rain" position where one of the open areas or the reflector was positioned upward aa if to catch rain. Jim Wilcox