I love Wegmans, but I try to swing by after work when it is less crowded. The produce is top notch...at least the one in Ashburn, and the prepared foods are amazing! I try to stay away from bakery and prepared foods, because it is like a vortex that I get sucked into. I do spend way less for produce than I do at HT.

Plan to eat lunch or dinner at their buffet and then do your shop. The buffet is very good, and so are the prepared foods and food stations.
Big baked good selection. Try out some eastern shore brand tea and Yorkshire tea as PP suggests. Other than that, it is a big grocery store.

Their produce is better than any other grocery store I've been to around here.

If you live far away, it's really not worth the trip. At least, I've never found it to be worth it and I've gone several times. I think it's way over-hyped.