I lived in Winkworth House last year and it was great! You get to meet plenty of people as there are seven people in your flat, and 3 other flats in your block! It took 15 minutes to get into Uni but you have to trek up Park Street everytime which is a massive steep hill if you don't know, which is not too good... On the plus side, it's all downhill on the way home AND you're right next to the city centre where the clubs and bars are.
Orbital did a great job organising events too.
The biggest factor for me choosing Winkworth was that every room is en-suite, which is awesome!