Very easy to install the replacement screen and gasket. The portafilter is easier to install and tighten with the new gasket. Coffee grounds are easier to clean off the nanotech shower screen.
Probably should have gotten the 8.5 mm for my unit. Otherwise it works very well. Nothing sticks to it, lots of fine little streams of water, Don't be lazy like me, measure your old gasket for thickness if you don't know.