I started using a Burris FastFire 3 this year, 3 MOA, and really like it. Haven't had it super long to tell you how it lasted but I know plenty of guys that have had them for years and haven't heard of any trouble minus changing a battery occasionally, although, keep a spare with you. I can imagine it is a sickening feeling to be near a bird, turn on the red dot and get nothing because the battery is dead...