.... Okay, you sold me... I dont know about the O.P. but I just ordered some..
I'm already a fan of 5.11, I have some now (barely lol) I was just wanting suggestions to look at other boots.
Ive got a pair of 5.11 ATAC side zipper boots that are about 2-1/2 years old and I love them. Zipper tab just broke on one of them yesterday, so I guess Ill have to look into replacing thsi pair(does the lifetime warranty cover that too and repair or replacement on broken zippers?)
I am going to call 5.11 today if they're open, I'll ask specifically about your problem.