It's okay if you're looking for a quick place to stay right next to the train station. I'd put it at just above a hostile in terms of quality. There's a common bathroom that ought to be cleaned a bit more, there's no elevators, and no AC (so it gets quite balmy in the summer). I also thought it was a bit more expensive than was justified given the above conditions. Still could be justified to stay if you find it for cheap and need to be close to King's Cross.