I'm on my second bag. When the zippers started failing on the first bag after a year I was REALLY careful with the second bag by not over stuffing, occasionally spraying the zippers with silicone spray and carefully using the zippers...the big front zipper still failed after a year. However the smaller zippers are still fine.

So basically the bag lasts for a year of every other day gym use. I'm too cheap to get another bag so I now use my lifting belt to keep it closed and that does the trick. WHEN the front zippers fail I'll just sew them up and make them into pockets so the bag will last me forever. It's still a good, well designed gym bag even if you are aware the zippers are going to fail if you're a gym rat.