<p>I’ll make some general comments about some of these areas (I live in an apt in the Davis Square area, and have now been in Camberville, as a student and then as an alum, for nearly five years) and you can do what you will with it.</p>
<p>Harvard Square - Fun, plenty to do, pretty convenient (walking distance) to the MIT area). Has some issues with panhandlers, but is not a really high-crime area. Insanely expensive.</p>
<p>Porter Square - Fairly commercial area, includes both the Porter Exchange and the Porter Shopping Center. Large grocery store right there. If you love Japanese food/refreshments, this is the place for you. Slightly less expensive, in general, than Harvard or Davis, but still expensive. Easy T ride to MIT, but walking is a little much unless you’re a walking fiend like me.</p>
<p>Davis Square - One T stop further out than Porter. Crunchy granola liberal neighborhood, very low-crime, except for possibly the Tufts campus itself. Pretty expensive. Quirky, the Square is fun in the summer. Near two very pleasant major bike paths. Lots of churches in the area, if that is important, generally liberal ones. Packed with 20-something recent college grads.</p>
<p>Central Square/Area 4 - Highest-crime area of Cambridge, probably, but honestly not that bad (I hear that it used to be). Extremely convenient to MIT and Tech Square (short walking distance). Lots of Indian food. I would guess that it’s a little cheaper than anywhere I’ve mentioned so far, though I don’t really know.</p>
<p>East Cambridge/Lechmere - Looks really seedy, is not quite as seedy as it looks, but can still be rough. Probably the cheapest option so far. Convenient to MIT (short walk). Right by the Galleria (Cambridge’s major shopping mall) and the Museum of Science.</p>
<p>There are other possibilities, but this is a starter.</p>
<p>No matter what, he should consider getting roommates. Otherwise he’s likely to be shelling out at least $1000/month, probably more, and in some of these neighborhoods it’s non-trivial to <em>find</em> an apartment for one person. I live with two roommates, and the upstairs apartment has five people.</p>