Bikkuri is the best restaurant for take out. I've never been to the restaurant itself, so I can't comment on that.
But from my weekly ordering in, they're fast and efficient, the delivery man is always friendly, which makes it ordering from them not intimidating at all. Their food is always hot, which to me means that they make the food right when they get the order. The food is always delicious, I've fallen in love with their donkatsu don, or the chicken don. I always order that from them and a variation of sushi. They never skimp out on the meat in sushi, which is always pleasant.