I stayed here with 2 friends (3 total) and everything was perfect, i think 4 would be a little crowded but it will work as well. When you first arrive the apartment is really neat and everything works perfectly (really good internet, good coffee maker, good kitchen). The communication was great, the host was really responsive. The only bad review i will give to this apartment is the neighborhood, it is in the "Tenderloin" which is the not-so-good part of San Francisco because there are many homeless. Luckily the apartment is on the edge of the Tenderloin so you exit it quickly. While we were there we didn't experience any bad situations or any suspicious activity, just a little dirty street with a not so great smell. Apart from this the only suggestion I made to Landmark was to seal the windows properly to make them soundproof, because the noise at night and in the morning was unbearable. If i had to rate the apartment alone it would be a 10/10, rate it with the neighborhood 5/10, but once Landmark seals the windows 9/10.