North Cheshire BKA bought one this year as a trial hive at their Walton Apiary, and put a swarm in it. Just when we thought it wasn't going to do much - the bees drew out all the frames and filled the super with honey. The frames at the edge of the super were more full than those in the centre - perhaps as a consequence of the excellent thermal properties.
Obviously the next stage is to see how the hive performs overwinter and how long lived the components are.
Comments -
Easy to assemble the frames etc., agree with the comment about lots of plastic bits - but there are some advantages in not having nails and hammers involved.
Easy to run 2 small colonies side by side, they also have a system which allows you to run 4 colonies (queen rearing) which also looked useful.
Frames aren't compatible with anything else.
Because of the size of the frames, a full super is very heavy.
They're not cheap.