I had a short but very enjoyable stay at Charles and Christiana's guesthouse in the Omega room. To echo some previous reviews, yes, this is an older unit and the shower stall is indeed tight. However, the place was tidy, the bed very comfortable, and the location fantastic: a several mins walk from the shops/eateries/campus of Harvard Sq with a bus stop (going to MIT and downtown Boston) literally next to the front gate of the house. Aside from some low rumblings of the Red line subway running underground which I found soothing, the basement-level unit was quiet and naturally cool which I very much appreciated as Boston can get hot in mid-May. There's 1 other bedroom ("Alpha") in the unit so the kitchen/eating area and bathroom are shared with other guests. However, during my midweek stay, I didn't run into anyone else so basically had the place to myself. Otherwise, everything was smooth and Charles very responsive on the few occasions I messaged him, including at 11p after my late-night arrival into Boston the first night. Bottom line: great hosts/place/value and would definitely recommend if you're the type that doesn't need the newest appliances and construction to have a comfortable stay.