My friend and I stayed for three nights. The condo faces to SUPER busy road, the busy traffic starts from around 5 am to 11 pm. Plus, a high beep was constantly going off all day and all night long, which eventually someone fixed it. I couldn't sleep on the night, but after that we were able to get some sleep only because we were tired from walking around the town all day long.
We didn't use the kitchen or the fridge at all, but if you plan to cook, you'd need pretty much everything, oil, seasoning, etc. There are only two cups and two glasses, and a tiny table, which is not for four guests.
After raining one day, it got much cooler and we needed to warm up the condo, but we couldn't find any facility. Next day, we found the round thing on the wall, which we eventually figured out it was a heater. It'd have helped if the owner had told us how to use it beforehand.
The owner was not in the house, but in Maine, quick to respond to our questions. The condo is close to the bus stops, but Harvard square is only 20 min to walk in the pretty and safe neighbourhood.