I left there a few years ago and thought that it was a good gig. FIA is reasonable, coupled with GYH(T) means that you can live fairly reasonably with the money provided. Couple that with an Oyster card (albeit that you pay a meagre contribution towards) and I rather enjoyed my time there. Sold the car and embraced public transport with a railcard. In fact, I'm looking to go back there on my next tour.
As for accommodation, I had an input into where I could choose from and had a look around a couple before settling on one. If I was to go back, I'd avoid the Canary Wharf/South Quay area. However things may have changed.