Product line with expectations. Unlike the set of 12, there is no bad problem of protecting the sticky part on the 3 items. Generally, in some room, you can often blame the lack of centering the self-adhesive foam to the metal surface. Overall the product is easy to use and the setting of quality is satisfactory compared to the binding to nails for use in the ceiling painted with flat paint. The DAAF used is a "smoke detector Brennenstuhl BR 166 Basic" which has a weight quite standard and lightweight.
Would recommend to people who have little time because the product is very well fixed.