Image quality seems good. I can attest to the fact that they're durable - dropped the 6 stopper on the 2nd day in the field after getting it and it's fine.
17/11/2020
Love them but the box was messed up and torn i need to clean them they where cover in dirt even tho they where in a case in the box
06/06/2020
Was recently able to use both the circular polarizer and the nd64 on a shoot. Thoroughly liked the results from both, especially the CPL, which was used on the shot shown. As with most filters, be careful not to tighten them down to tightly.
10/09/2019