I haven't tried them but I know a guy who uses them all the time and he loves them. Personally I prefer the jzbz cell cups because i can see whether or not there is excess royal jelly when I go to place the cells. If there is excess jelly I know the queens were well fed and I will place one cell per mating nuc. However if the cells do not have much royal jelly or none at all I will place 3-4 cells per mating nuc.
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