Great as a straightedge, but Sharp Edges.
4.5 Stars. Well made. Thin enough to use as a bookmark and very slightly flexible but feels sturdy. I use it to draw straight lines and underline text in my textbooks (the book's pages are slightly curved, so a little flexibility is good). The edge is perfectly straight.<br /><br />Only issue is that the edges are sharp. This actually helps you draw straight lines as, if you angle the ruler against the page it's sharp enough to grip the paper and hold still while you drag a pencil/pen over it. Also doesn't leave any gap between the ruler and the page, which is good if you wanted to use it with a marker I guess. But it is seriously sharp, as in, airport security would confiscate this sharp. I actually coated one side with a strip of black electrical tape so I can grip the thing without fear that it's going to cut me (which I think it would if you gripped it hard enough). Again, I don't really consider this a con because it serves my purposes, but I wouldn't get this for kids or if you plan to handle it a lot and need to use it as a ruler and see both sides (because my electrical tape trick covers one side). If you just need a really good straight edge, this is pretty great for that.
Rating: 5 stars