I've had maybe a dozen over the years with no failures as yet, but I'm not a twister and don't bounce my stuff around a lot. I also go slow on the ring screws, but like them pretty tight. When one goes belly up on me for no reason, I'll try something else.
Many, no make that most, other brands either look too tactical for classic rifles or too European. The Leupolds for hunting rifles look just about right. They're also very user-friendly as regards eye-relief and head position, qualities other brands often sacrifice in exchange for other optical properties.
