If you are here to watch a heartwarming story of an old man telling about his work, his life, and him preparing ramen and tsukemen for ever, look somewhere else. This is a sometimes very sad story of a man who seems to keep working because it was his life and his late wife's life and it is very important for him. There is little focus on the creation and the food and a lot about him keeping the ship going whatever happens (his leg problems, his hands' problems...) and his relationships with disciples and clients. It is interesting, and it shows a world (and a Japan) that you probably can't find anymore (well, the queuing for hours is probably still going on).
That doesn't mean that you shouldn't watch this, because, as said above, it is interesting. However, some of the decisions by the director (who doesn't seem to care much about Yamagishi's private life or at least it sometimes feels like that) are questionable.
