The self-adhesive bags are a great idea and the solution to this problem.
The plastic bags look neutrally and disrupt any interior design style. They adhere well even on something lined timber, and do not break even after several changes the paper insert.
The supplied documents are easy to print. The dimensions are well read on the homepage of Avery in the PC, the paper from the printer (here HP LJ) well recognized and there is a clear typeface, without blurring.
The signs must be separated from each other well and without fluff.
From me a buy recommendation.