The location on Garrison Street is great. It's steps from the Prudential Center, a short walk to Copley Square, and a 15-20 minute walk to Fenway. The apartment complex is very nice with a courtyard in the center. There is supposedly a roof-top deck but the signs all say you have to privately reserve it - didn't seem like you could just go up and use it. It felt safe (gated and locked entrances even once inside the gate) and was on a quiet side street. The complex is not run by StayAlfred, so there was a concierge but he will only help so much. The apartment was well-stocked with towels, toiletries, and dinnerware.
The downside: the beds are very firm (the queen is HARD). The blinds do not block light well so be prepared to be up at the crack of dawn if light bothers you. The bathroom is very small and water pressure a bit light in the shower. There is a mirror in front of a small vanity in the bathroom and one in the King room, but no others, so if you are traveling with a few people (we had 4 adults), be prepared to be sharing the mirror in the King bedroom. The TV in the King room did not work - it said "initializing" when we turned it on. The TV in the living area worked but only the Roku. The cable came on but the remote didn't work so you couldn't change the channel at all. Finally, the couch (loveseat) was the hardest couch I've ever sat on, and it had no pillows. Think concrete bench with high square armrests. Fortunately, we had good weather and didn't spend a lot of waking hours in the apartment, otherwise this would have been a big problem. The location and safety of this apartment saved this apartment from being a real bummer.