Sydney Sails

Made the 4 hour drive to Sydney today to visit an old friend from London (who is visiting her younger sister who lives here) and we decided to catch up at the most iconic of all Sydney landmarks, the Sydney Opera House. Many stories past and present were told and many beverages were consumed. As we went our separate ways I'd thought I'd have a go at photographing the sails of the Opera House in the early darkness of the evening and this is the end result. I like this photo a lot but I'll have another attempt when I return next Saturday.
What are your thoughts with this shot?