For the price you really cannot beat the "big John" which is a roast beef sandwich on white with chips and a drink. Don't forget to add the hot peppers and the oil & vinegar combo or else you're just getting lettuce, Mayo and tomato as standard dress. The only complaint is the fact that Cheese is something you must request and have added after the fact, which i learned on my first go around when my order came sans cheese.
Other than that everything else is A-OK and do yourself a favor and get some Sea salt and vinegar chips. Your taste buds will love you for it.