No, it's not better than nothing for low shots, really, because you can't see how you're focusing very well, at least not for macros. I actually bought it for my G10 when I first got that, didn't care for it much, and stuck it on the G9 to use more as an LCD protector than anything, after that camera was mostly relegated to the old camera drawer.
But some people do like it. I'm not saying don't get it, just that some of us were disappointed with its performance. It didn't do what I needed. That doesn't mean it won't do what you need it to do. The point of my first post in this thread was that there isn't any need to be concerned about glue and how well it's made and so on.