How are you finding Grubhub? I've been trying OrderUp, but it's a little bit of a mess, and their customer support has yet to answer an inquiry that's a couple days stale by now. I gather Grubhub is more or less eating everybody's lunch, excuse me, but before I sign up with yet another bloody website, I'd like to get an opinion from someone who's already using it.

(Postmates is good, too, if it's in your area, but the fees can get a little spendy.)