I thought Dani and Vinthent's worked best, but they had the easiest combo (and it could have done with a touch more QS).
The jive and QS went well together too, and felt seamless.
I liked Kim and Pasha's performance, but it was overmarked and not real cha cha, imo.
Nicky was on a hiding to nothing with those two styles and that music, and I'm afraid he failed with both styles

.
Lisa and Robins' was awful. They made no attempt to integrate the two - just did one after the other (and neither very well).
Louis and Flavia also didn't integrate, but they used the build in the music to make sense of the two different dances, and that really worked for me. I loved his rumba especially.
Overall, I think they did well. I enjoyed it