Love it. Super central, and close to our favorite coffee shop/sandwich shop, Darwin's. Super walkable to Harvard Square and the rest of Cambridge. Anne was responsive and even left us water, wine, coffee, and cheese. I slept like a log on the firm bed. The major hotels in Cambridge (Charles and Sheraton) are a stone's throw away, so if that's what you are considering, I'd save a couple of bucks and stay at Anne's and spend your money on all of Cambridge's shops and restaurants.
One caveat. I think her photos don't do the place justice. It looks a bit dark and gloomy. While it's quite cozy, the place actually gets some great light, especially in the living room. But ultimately the trump card here is location, location, location. Thank you, Anne!