Well ..they are on the money as far as insulation is concerned but you can buy an awful lot of Kingspan for £65 .. and it probably does a better job of insulating a hive. I think we've seen this on the forum before from memory ...
3c to 5c temperature rise ... you will do better with the lowest performing poly hive.
a lot better with the highest performing
a 50mm PIR cover is a long long away ahead in performance. However you can't fold a PIR away, but you could paint them green.