Taking a break?

Last night a friend told me I should take a step away from my unfinished MS and do something else. Not because I'm necessarily slowing down or stuck, but because I pushed so much during NaNo that I should give myself a break before finishing it.  I can see where this could be helpful, but I'm also concerned if I leave it, even for a week, that I will become disconnected and struggle to pick it back up.

So I pose the following questions to other authors out there. Do you think, after a big push (I did do 57k words in the month of November), it's a good idea to step away for a week or two before going back to writing?  Have you tried it? How did it affect your writing?

Any advice, ideas or general snark would be welcomed!