It's going to be 30°, they're going to have to shut the roads around town this year - it's going to be rammed.
I went last year and whilst it was busy, there were few places where you couldn't get a drink or even in the venue. It was packed in Soul Lounge, and Underground didn't have enough bar staff on, otherwise, it was a great day. The weather was good then too, albeit not as hot as is forecast this weekend. There's 29 venues taking part now too, which eases the overcrowding issue a bit.