Am a new runner who started running 5Ks, 10Ks, and a single 10-miler in 2008-09. Started out with Asics, and knowing little about running shoes, kept looking for bargains. Ended up with Sauconys and Nikes for a while. Also ended up being sore around my achilles and knees for a long period of time. Finally went and got fitted at a running store and they recommended Asics Gel Nimbus - expensive, but a smooth ride. Developed some serious knee pain over time and finally went to a podiatrist for advice. Turns out the Gel Nimbus were too soft, especially in the heel for my running gait. Also turns out that one leg is 3/8 of an inch shorter than the other, this being the biggest cause of the knee pain. Podiatrist provided a list of acceptable running shoes, including the GT-2140s, which he said would be firmer in the heel. He also provided a 3/8 inch lift which he said to put under the sole of the shoe on the shorter leg.
The GT-2140s have completely transformed my running experience. They are firm but provide just the right level of support for my gait. Best of all, I run more or less pain free and there is nothing better than that after a year of gritting my teeth as soon as I hit mile 4 and pushing through. Now I am training for a marathon and I have put 150 miles on these shoes in the past seven weeks and they are holding up well. I hear that these are going to be discontinued soon, so I feel like I will be buying at least two more pairs before that happens! Highly recommend these shoes for runners who don't over-pronate, but who need stability and a firmer heel.