Overall, it was a great stay. The price was discounted (I'm assuming since Boston isn't too popular in mid-February), so we got a really great deal. It was a nice and basic apartment that had everything you'd need. The only odd thing is that there was no overhead lighting, and a bunch of the outlets either didn't work or half-worked. I also didn't realize we only got one set of keys, and would probably request a set for all 3 of us next time; we did not because we were very pressed for time and managed to work it out.
Harry was super responsive. Some of the instructions were a bit verbose and it made it somewhat difficult to find information, so it would be super helpful if the important stuff was listed someplace accessible (like the wifi info & checkout instructions for example), or printed out and laminated someplace in the apartment.
The neighborhood was great! We practically walked everywhere aside from taking the train a few times.