Jack's apartment is definitely a gem. It's close to both the tube and train stations, but just far enough so that there won't be any noise/traffic that usually comes with subway stations. It's also right above a large grocery store that stays open quite late in case you are looking for a snack, or looking to cook in the apt.
As fo the apartment itself, it's in a new building, so inherently it will be modern and chic, but Jack keeps the place spotless and clean. I felt like I was at home for my entire stay!