BB&B for us as well
We could return/exchange easily (I returned a cutting board that came apart after a few months, though I haven't returned the shower curtain that started rusting and I should have (seriously folks, yes, there might be water on a shower curtain, might want to take that into consideration when designing). We also took every single item and applied the 20% coupon to it, when the purchaser had not. This allowed us to buy an All Clad pot set (using credit from exchanging a single pan received as well).
Most used items: Wusthoff knives (3 to supplement a set) and steak knives, All Clad pot set, shower liner
Next most used: Breadmaker, sheets (originally thought unneeded now, but our flannel set just died), iced tea maker (yes, we could make it w/o, but we didn't, and this was better than drinking coke all the time).
Least used: The odds & ends I put on the registry because I thought people would buy for a shower or to "fill up" the registry to their desired spending amount. Other than one spatula/flipper, that was very useful. The non-registry store items some people got us (wooden salad bowl set - no space in kitchen for and have tons from travels, pottery barn measuring cups in a shape of a turtle - pretty but hard to use, etc.). Note, we loved the non-registry non-store items people got us (handmade caramel favors for our wedding, a rug from India, a box of 10 selected wines, our engagement party, etc.)
Now that we bought a house and have more space for entertaining, I intend to use the china more. Also hope to use more of the slow cooker, blender, kitchen aid. None have gotten as much use as they should have. Read that I should get a second bowl for the kitchenaid, which I did, and that got no use.