I have pretty much always used wooden frames with wax coated plastic foundation. The brand of foundation we usually get up here is a product called Permadent. It has the bottom corners cut off (for communication passageways I assume). Well, on my last order the supplier I use for large orders was out, and offered up Pierco wax coated foundation in its place. I knew Pierco made complete plastic frames but was unaware they also sold just foundation. The cost was the same so I bought it. When comparing the two manufacturers products I could not help but notice the difference. The Pierco is made of a much thicker plastic, doesn't have the cut off corners at the bottom, but it was fairly dripping with beeswax. Pierco obviously spared no expense coating this foundation, it was on there thick. The Permadent has wax coating on it as well but not so you would notice so obviously. You can smell it but almost have to rub it to feel it on there. I will be interested to see if the bees take to it any more readily than the Permadent (not that it was ever a problem).