Weaknesses: Memory foam is not responsive and gives you blisters.
Overall: I have been running for the past 7 years, 5 of them in asics GT series. For the first few years I suffered from blisters until I found the GT series. I have had no problems since until this version. It can only be down to the memory foam insole. After about 4 miles you can feel your feet start to heat up and a few miles later...blisters galore. Why mess with something that isn't broken?!! There seems to be a fashion for memory foam in everything recently but it isn't working in running shoes.