I bought in to the hype and decided to give these a try. These seem great in theory. However if you install the flashing square and screw the cap foot on the cap foot was not tight at all. The cap foot rattles around. I didn't have time to return so I went back and turned the flashing out of square until the cap foot would be tight. Waste of time and the flashing looks all jacked up out of square with the shingles. The panels hide the flashing and I got them tight enough. So they are OK.