Good but tough (to fit)
"Product itself is pretty good, looks like it is put together really well but it is a struggle to fit. Says more about how the car than the product. However given the nature of these filters where they are more like a solid block, they are not flexible like the ones that come standard and therefore getting them into the tight space that is the drivers footwell is nothing short of a nightmare! The allen key that is supplied is not required if you're fitting it to a M3 Highland, even the pry tool is basically optional. Everything can be removed and replaced by hand."