Ik who someone who visited both WSBA and Tower Bridge physically, and they say it's as beautiful as it is on the website!That kind of boosted my confidence, and it seemed a lot more popular/in a better location than the others! If you look up 'Westminster Student Bridge Accommodation' on Google Maps, walk a little bit and turn to the path on the left, if you go straight down you'll be right at the London Eye/Big Ben! So it's in a very very cool location, and you can walk to just about any of the major museums/restaurants/cute streets. This is what I have to do since I can't actually visit lol, live vicariously through Google Maps. Also they have 2 floors just for KCL students, and a few for LSE etc, so you live with people from the same uni but interact with people from others- which is awesome. Also it has unlimited wifi/free to use iMacs, free bike rentals as well!But yeah, it all depends on your budget