I have a TNF polar circus (daypack). The first time I used it, a shoulder strap pulled. I sent it back and they fixed it. After using it for 2 more day hikes, I got 2 holes in it. I sent it back. After 3 weeks I called. They said they sent me a letter (which I never got). They didn't call or email me.
They said the pack was unrepairable, and offered me 40% off their high retail prices on a new pack. I said no thanks.
I was able to repair the rips with adhesive nylon tape.
Last week, one of the shoulder straps pulled a seam, as there was insufficient margin on the seam. I have never done any 'hard' hiking or climbing with the pack. I have owned some good packs and tents from TNF, but recently their quality and support have gone downhill in a major way. I won't be buying any more TNF products.
My wilderness experience pack has withstood 10 years of daily use, and 10 more years of intermittent use. It did get a small hole in the bottom, the zipper pull wore out, and the waterproofing peeled.
It is 50 times more robust than my TNF polar circus.
My McHale packs look like new. My WildThings pack has seen more abuse than my polar circus could possibly survive. So I understand how packs are supposed to wear, and what is reasonable use, and what isn't. The polar cicrus looks like new, but needed repairs 3 times.
TNF should have fixed it, or given me a new pack. Epic fail.
I have some pictures of a blown seam and holes in the pack at: