I've put over 65000 miles on these tires in all kinds of driving conditions. The only time I've had some concern with these tires is when I'm on ice or deep mud. But this is an All-Terrain tire meaning it's good in all conditions (if you want a tire that specialized in going through mud, get a mud tire! Same goes for driving in winter/ice). I rotate my tires every 5000 miles and after putting 65000 miles on the guy at my tire shop told me I could probably put another 10K-15K on them. As far as reliability goes. I've never had a flat. On numerous occasions when I've brought my truck in for rotations the service people have pulled out nails or bolts from my tires (they're usually stuck in the tread).. again, I've never had a flat tire! These tires are a little more $$$ and they will cut your mpg's down compared to a regular all season or typical OE radial, but this tire CAN do it all and it WILL last!