I too have noticed that this is a heated topic on many other boards.
I decided to try them myself at the recommendation of a trusted friend, rather than trust a stranger's opinion. I am glad I did. Like Speedy said, they are easy to A/B test, and with the money back guarantee it is a no-brainer.
I noticed one of the posters (Mr. Albright) owns some Parasound equipment. I think he would be surprised to find out that Mr. Bob Crump (designer, engineer extraordinaire) of Parasound loves the Bybee filters, and highly recommends them.