He is a lovely young man and a serious artist who is always a pleasure to watch.
Do you know him in person? Watching him onstage and having met him briefly after the performance, I make no effort in thinking he's a great and lovely person, too.
Polina Semionova is of course a great ballerina - more of the "modern" type, I think, so, while I appreciate her a lot in contemporary works, I don't think classical, 'Petipa' roles suit her so well. Personally, in ballets like Swan Lake I prefer other ballerinas. I think you will have a good time watching her, though, especially if it's your first time, as she has a strong, clean technique, great extensions, and beautiful lines. Please report about the performance when the moment will come!