When I lived in IL, I used to visit the RRS there for their Adventure Runs with my friend who lived down the street. We got in a run, caught up with one another about life and kids and were entered into raffles at the end (that I never did win, but she did!).
The people at this location are super helpful and obviously have passion for helping runners. We attended the kickoff party for the 2017 Adventure Run and grabbed up our shirts (though I sure wish there was a small tank left... I was too late!), participated in the run, enjoyed some local beer and pizza with a bunch of other clearly awesome people.
There is no question where to turn when I need more running gear. This place is big, organized, and the people are so nice! I'm not the only one who agrees because outside of our running group that night, the place was hopping with others getting their fittings, etc.