We stayed here for the Boston marathon and at 0.5 miles from the finish line, the location was really great. I didn't realize the apartment was on the 4th floor of a building without an elevator so that's something to keep in mind.
We also had issues with people in the building having a really loud party next door. They responded to my compliant quickly which was nice but it took a while for the guests to leave. The host also checked in with me in the morning after that noisy night.
The bed/pillows were really uncomfortable for me. You might want to bring your own pillows.
It's not a bad place to stay, but I don't think we'll be returning.
If you aren't too picky about your mattress and you're not sensitive to noise, the location of the apartment was nice.