Would be 5 stars unless you really have to be careful not to slip. Without this tool, at work I would use a chain wrapped around my arm with some sort of carabiner to secure it and pierce it with a pry bar. The same thing that makes it so comfortable (it's the ability to slide right up your hand due to the open side of the tool) can also pose a risk of slipping. As long as you're careful, I'd say you're good