After assembling and using this extractor - I can confidently give it five stars. I have used many others from Dadant and Mannlake - this is very solid and it takes care of the comb. I didn't mount it and it did shake when load was uneven, but that is an easy fix. I used medium frames. love the auto stop and the clear covers. I waited years to buy an extractor and I am glad I waited and this is it. I keep about 10 hives year round.