I thought he was brilliant, but as often happens with these day festivals the crowd did their utmost to ruin it. I had four people in front of me who decided to go up on their mates' shoulders for nearly the entire set (I was just to the right the platform he was singing on). Another group spent the majority of the time having a chat or screaming, usually during the quiet parts. Someone to my right threw up in the middle of the crowd as they were too drunk.
Once I got past that though... I thought he was superb. I loved the stage set-up and the visuals on the screens behind him. Nights, Good Guy (with the extra vocals!) and the kind of back-to-back house remix he did for Thinking About You were my highlights. Shame he was a late and there weren't a few more tracks from Nostalgia Ultra / Channel Orange.
Agree Solange was great, and Sampha too. I guess all the aforementioned dickheads went to Jamie XX.
(Edited as I apparently can't think of an adjective that isn't "brilliant")