Does anyone have experience with the Cokin Z pro holder. It seems to be somewhat comparable to the Lee holder and cost slightly less than the Lee foundation kit. Any 4x4 or 4x6 should fit either the Cokin or Lee.

Also, does anyone have any experience with filters from Cavision? They are glass 4x4 and 4x6 filters, at a reasonably lower price than the Lee filters. Found them on BH.