I have The Angler. It came before Angler 2 and is the same except it has only the two 45-degree lines, not all those other ones; however, it works on the same principle. I've had it for years and have not used it for years. As I recall, I was not thrilled with it when it was new.
I will "play" with it this weekend, however, and give you an updated opinion in a day or two.