I have tried the new dryer thingy and at first it was very convenient and I liked the scent.  However, long before it was necessary to change the pad,  the holder fell off the dryer bin and no amount of replacing it kept it in place.  A better adhesive is definitely required and I don't expect to go back and get another unit.  It is not exactly strenuous or mind straining to toss in a flimsy dryer sheet and throw it in the trash when the laundry comes out.  So, my opinion is "good idea" "poor execution."