I can't say enough about the location of Jason/Jose's place. It was in a perfectly convenient location for exploring the North End.
There are a few things to check though. First is there is no parking, which is pretty much a North End thing anyway. Second is there are four flights of stairs to negotiate and the building is older so the stairs are of an older style but worth the effort. And third is that there really isn't a kitchen or any way to cook. But then again this place is in the North End so you will likely be on the hunt for local food.
We could hear the people below us, nothing disturbing just some muffled talking and the occasional sneeze, and that made me a bit self-conscious about our own noise level. If you tend to be on the noisy side I would look for something with more insulated walls.
A great affordable place. I hope to be back soon.