Can I take credit for coming up with the idea to rank conbinis? After all, I was the first one to rank them, in my reply to the Circle-K bentos post.
It is a toss-up between am-pm and Lawson. There was an awesome Lawson in my old office building with the largest selection of bentos I had ever seen. But am-pm seems to be offering better hot bentos, without preservatives. Disclaimer: I have an am-pm in my own building, but it sucks. I guess I got stuck with a runt version of a real am-pm store.