running shoes are very personal... the guy who sold me mine told me every person needs different shoes..
some walk more on the outer part of their feet, some more on the inner part... this amongs other things makes it really difficult to just pick point a shoe and say its great for everybody
i wore celtics when i used to run.. i tend to walk more to the inside, so after some tests that what he advised me
they're pretty tight, since i'm overweight i tend to open my legs a little when i run, the tighness prevents me to make an 'o' and screw up my lower back
the best thing to do IMO, is to go to a store where they are experienced with fitting running shoes..