I love fiber optic sights. In the daytime. Since I rarely am out and about after dark these days I find them very useful for daytime excursions. For night sights I like Sig's XRay3's. Having that green circle around the tritium really brightens them during the day. I even added some green sight paint to the white ring around the outside of my front ECO night sight, making them much like the XRay3 sight. But my favorite are Fiber Optic/Tritium sights. Best of both worlds. My PM45 came with them, and I wish all my carry guns had them.