Running Shoes

I'm embarrassed to admit that after 4 years of running, I have only recently acquired a pair of proper running shoes. I'm lucky that I haven't suffered any injuries wearing my old, flimsy Pumas! I didn't do much research for this purchase - I just walked into DSW, wandered over to the running shoes section, and started trying on a few styles. While I like these Nike runners, I honestly haven't noticed much of a difference while running. Will I start to notice more over time? Or is there something wrong with my feet?

Hopefully, these new shoes along with the new workout clothes I bought will be motivation for me to stay fit in the new year!