I loved staying at Celia's penthouse apartment. It's a gorgeous little place, cozy, with a lovely decor, books all over, you just feel home. The house itself is beautiful. Bathroom is lovely and there's even a small fridge and coffee maker. The subway station is only 5 mins walk away and conveniently takes you directly to the city center (10mns from State Station), so it's a perfect location.
Jonathan and Celia were fantastic hosts, so friendly and welcoming. Even though Jonathan doesn't live there, he was always very quick to reply back via email. He was also so kind to even drive me on Saturday evening to a convenience store to buy a few things, as it was raining, thanks a lot:)
I can only highly recommend Celia's place, I know if i ever come back to Boston, I will stay there again!