I've kept bees for about 7 or 8 yrs now. Everytime I was shopping on mannlake or Dadant any of them. The slatted rack always caught my eye. I never got. This year I pulled the trigger and got one for each hive. I wish they sold nuc size racks. So I always look on inspection if the rack is good or not. I'll say this alot of bees hang out on the slatted rack. It actually looks very packed with bees down there. It must work the bees like it. I may buy a 10 frame rack and cut it in half and use it on the nucs. I'm curious on others opinion on the rack.