I like the Pro Nuc idea better than the EZ nuc, but it seems to me that if the bees are given any time to build, there will be burr comb all in it. With the beveled sides (so they can stack), and the high top, it seems bee space must be badly sacrificed. Is that not an issue?
Not to mention, it seems might drafty compared to a wooden nuc for early spring cold snaps.