|The up side is that these foundations and frames do not fall apart. We all hate when a top bar comes loose from wooden frames when you are working your bees, and I dont care how many nails and if you glue them together, the wooden frames get old and fall apart.
Secondly, I know that plastic will over time fall apart if left in the sun, but if the frames stay in the hive. I believe they should last forever.
They warp and bend slightly when full of honey. Also, the bees do not like them as much as wax foundation, and will ignore them until they run out of space and are forced to use them. Another problem is when you give them nothing but plastic frames in there supers, they will build at times odd and misshapen comb. I still like them better than wood. Once you got comb built, there is no acceptance problems.|