IMHO, Blade front sights are fine for paper as they give definite edges to use for accurate shooting. I like a white or silver bead front sight for hunting as they are faster (for me) to pickup against a dark colored animal.

I'd like to try the XS sight with the white line up the center of the front blade but I don't feel like disrupting the sights on any of my present rifles to find out if I like it or not.