I bought my first burris scope 6 years ago, still just as good as when I bought it. Clear, holds POA, and it gets used every week. its been used in 110 heat as well as -0 cold, rain and snow, never fogged or malfunctioned, its repeatable, Oh and did I mention the ballistic plex reticle.
I love my Burris's, not saying they are better than everything else, but they have never failed me once.