I bought one for my new bow this past spring the extreme model that is camo, and came with balance bubble. I got a 3 pin. My only complaint is the pins are fragile I broke one toying with it, but I have yet not to break a fiber optic sight pin. Trophy Ridge was very cooperative in getting more pins out to me, and they aren't all that difficult to replace. The replacement pins come with directions. Other than that I really like the sight. I noticed right from the start how easy the sight was to attached, and setup on my bow. Adjusting the sight overal, then fine tuning my ranges by adjusting each individual pin was a snap. I used it for 3d shooting all summer, and I found the bubble to be very handy. Then all of hunting season. The vertical pins seemed so natural to me. I'm very happy with the sight!