My four stars on build quality might not be fair, because these are designed to be used on Pro Kettlebells and I use them on normal comp kettlebells. On a normal comp kettlebell, they will slip on the bottom, especially as you put them down. They are fine during the movement so its not a big deal. On a normal comp kettlebell, they do extend the length of the kettlebell (especially the 2kg) and that leverage changes the movement pretty drastically. But, if you are wanting to micro load kettlebells there are no better options.
Performance
Value
Build Quality