What a coincidence. I went into REI today to try to exchange my Kimtah I got in April 2012. I take really good care of it, use tech wash gentle cycle, etc etc. But the seam tape was coming off all along the right zipper area on the inside after less than a year. I've used seam grip to repair what i could but the delamination keeps spreading. Unfortunately, REI would not replace it for me as I purchased it on sale (59.83) and apparently, once they " update" a line and pricing, you're SOL and can only get a refund or pay the difference for the new $239 Kimtah since my less than year old Kimtah no longer exists. Now, if I had purchased a MH, Patagonia, etc jacket, I'm sure the manufacturer would replace a defective jacket in a heartbeat, with the most current iteration if the old one wasn't available.
Long story short, avoid store brand. I shop at REI all the time, and as I don't return much stuff, this was something of a surprise to me. They don't offer straight replacements after they "refresh" a line, which is every season or year according to the employee. A refund is fine and all, but for a product that was defective (the employees agreed, however the manager would not approve a replacement), I should get a replacement.
Anyways, the newer version is larger now. I wear a small and my Klimtah is a small, but the refresh is noticeably larger, especially in regards to arm length. It is roomier in the torso/chest.