The Downers Grove Giordano's is quite convenient if you're puttering around Main Street around dinner time. However, plan on an extended visit, as the wait staff is SLOW in comparison to other area Giordano's. I'd suggest figuring out what you want before you arrive to help speed up the process.
The pizza is excellent, as most Giordano's are. However, when excellent food is combined with mediocre service, it's hard to call it a perfect experience. The decor is quaint, and the black and white photographs on the walls give you something to look at while waiting for the food.