After a carpet beetle infestation last year I put these up around the house to see if I had effectively prevented them this year. They worked exactly as described to help locate the areas that needed more cleaning and treatment. Trapped a half dozen in one area that I thought might need more treatment--they're definitely effective! Only complaint is I wish the traps came in packs fewer than ten.
Trapped adult male Varied Carpet Beetles as described.
Placed traps in sunny elevated areas (on windowsills and near attic vent) during early springtime and caught several insects even in areas that had been thoroughly cleaned and sprayed with hydroprene (Gentrol IGR) the previous fall. Trapped over a dozen specimen in the attic.
Glue was strong enough to catch a small mouse.
Not a 100% solution, but I'm buying more this spring anyway.