Installed 4 rolls of Grace Ice shield with rip cord yesterday to dry in an addition I framed for a GC, what a pain! My company specializes in framing however we take on 5-10 roofs per year, mostly on the houses and additions we frame, so I have lots of experience installing GAF, Certainteed, and IKO's ice and water shield products. The Grace we were using had the RipCord built in-what is this good for? Paper backing kept tearing when peeling it off, much prefer the plastic release on the cheaper products. Worst of all, the Grace seemed to want to curl back on itself at the edges where it has a sticky sealant, creating a bump on an otherwise flat roof. Won't be buying this stuff again, especially at nearly twice the cost!