Just upgraded from the GTS 11s because I wore them out. The 12s have the same great fit and cushioning. There is a very noticeable increase in ventilation through the mesh areas, which is much appreciated. If you liked the GTS 11s, you will like the new GTS 12s.

I switched to these after many years (20+?) of wearing New Balance. I'm a 41 year old, 260 pound triathlete (Clydesdale), and a midfoot runner who wears a 4E width. There aren't a lot of running shoes offered in 4E, but I've tried them all and returned all the others: primarily New Balance and Asics. I wore out a pair of the GTS 11 and now run in this new GTS 12. Other than color and a few minor visual changes I can't tell any difference between the GTS 11 and GTS 12. I wear 9.5 in NB and Asics and 10 wide in Rockport dress shoes, but 10.5 in these, so they're a bit small. Overall, I'm very pleased with the performance of these shoes, and shoes are difficult enough for my needs that it's a big deal. I'm also fairly happy with the price, though it's creeping up. If the toe box were just a bit taller they'd be perfect. More colors in the 4E width would be nice, but not necessary. I use these exclusively for running 4 days per week, typically 5k to 10k per run. Being a midfoot runner I can't comment on the heel cushioning at all: I wear out the sole under the metatarsals (middle of the shoe forward to the toes) and the heels appear completely untouched.

Right off the bat I wore these on an eight mile jog up 3,300 feet of elevation. It felt like I was on clouds. I am impressed.

I bought theses shoes a few weeks ago and have run one 10K in them. Although I have never ran with Brooks shoes before, I have found them to be supportive and very comfortable. I have no issues with them. I will buy them again.

My husband bought the GTS 11's last spring and that was his first pair of Brooks. He is a 'big and tall' guy and loves them. he just rec'd the GTS 12's and so far, they feel the same to him. He loves the support.