We had a nice stay at Phil's, we were there for about 3 weeks - the place is very convenient to the Red line and Cleveland Park is a very safe area to be in. The air conditioning is great and the kitchen works well. We especially enjoyed the gorgeous running trails around the Rock Creek Park area.
A few things to know - the mattress is quite broken with significant dents in parts - if you have a bad back it's probably not the best for you, and if you're working from home there is a very large active work site next door which causes lots of noise during work hours. There is a library nearby but if you're taking calls the rooms need to be pre-booked. We had some trouble with the washer/dryer but it does still work if you persist.