I was uncertain about whether these could actually be used as serious running shoes.  I took a gamble and ordered them anyways instead of the modern Sauconys, and I couldn't be happier.  They were inexpensive, look and feel plenty durable, have an awesome feel with support and padding in just the right places and even seem to promote good running form by forcing me up on the balls of my feet.  They are not at all bulky or heavy, allowing me to strike softly, and give me enough support that I hardly even have to think about them during my 6 mile runs.  I ordered my regular shoe size, and they fit just right.  If the style suits you, I highly recommend these.