I am moving a couple of colonies onto Langstroth nucs for someone; I like the easy construction of the boxes, it's a doddle compared to Nationals. The small hand-holds are not for me although you can always fix a strip of wood across as a hand-hold - although a poly lang might be different. I wouldn't mind using Langstroths although one box might be too small for some colonies.
I tried 14 x 12's for a couple of years and didn't like them. I also tried a commercial once although the queen failed during the spring so that experiment didn't work out.
I also made a 16 frame National, for fun. (!). The bees didn't like travelling to the extreme ends - and it was too heavy and cumbersome. That was shrunk back to a National later.
So I am stuck with Nationals and go to two brood boxes during the summer. it allows fame manipulation - say put old brood combs on the outside of the lower box to be emptied - can be split, demareed or whatever. And I do tip up the top brood box and look for queencells as a quick check for swarming. And you can usually put National frames in an extractor to remove honey - 14 x 12's/commercials are probably too big for that.
I tried 14 x 12's for a couple of years and didn't like them. I also tried a commercial once although the queen failed during the spring so that experiment didn't work out.
I also made a 16 frame National, for fun. (!). The bees didn't like travelling to the extreme ends - and it was too heavy and cumbersome. That was shrunk back to a National later.
So I am stuck with Nationals and go to two brood boxes during the summer. it allows fame manipulation - say put old brood combs on the outside of the lower box to be emptied - can be split, demareed or whatever. And I do tip up the top brood box and look for queencells as a quick check for swarming. And you can usually put National frames in an extractor to remove honey - 14 x 12's/commercials are probably too big for that.
May your bees read the same books as you do.