I was at Great Dover St last year and it was honestly the best choice for Strand campus. It was close enough to Central that you don't have to trek across London but also not too close. I have friends that lived at Stamford St last year and although it it just over the bridge from Somerset house they didn't get to know as many sides to London as I did. Because they lived so close it made them quite lazy about their surroundings. GDS is the same layout and furnishings as Stamford St but it's double the size and I found I lived with more science and med students which is actually more fun than just living with arts students if you are one. Personal choice I guess but living in Borough was lovely, especially as you are literally a short walk from London Bridge, Borough Market (food is out of this world!), historic southwark, Tate modern, millennium bridge and the globe theatre. There's nothing like strolling up South Bank on your way to uni.