I stayed at Jonathan's Cozy Studio while attending a conference for work. Jonathan's place was the perfect option! Roxbury is an easy neighborhood to navigate, and downtown was only 6 stops away on the T, which was right down the road from Jonathan's studio. The room was clean, had everything you could need (including an iron, hair-dryer, and even slippers). While the studio was small, it had every amenity you could want. Highly highly recommended!
Oh and Jonathan was the perfect host. Tons of details for your arrival and helpful tips thee whole time.