I just purchased the Extreme and put it on my Switchback XT. The pins are bright and I love where you add a light if you want one. With the light in the back, I don't get see it like you do on other sights. The only problem that I have found on it is that they needed to put something over the end of the fibers cause with the light on, they glow bright. I put a little electrical tape over the end. Like I said I love it and really haven't had to use the light since the pins are bright as it is.