We have just got back from a 49 day cruise on the Royal and stayed in B737. We had soot on our balcony every day, at times we were pelted by great chunks of soot and other times the very fine soot was on our skin and clothes. We had to wipe down the balcony before using and sit on towels. Consequently we were unable to use our balcony as much we wanted. I took some pictures which I have forwarded to Princess asking how this can be classified as a Premium balcony. I will never stay in this cabin again. I have had aft balconies on both the Ruby and Emerald and really enjoyed them. I really think Princess should advise when booking that soot can be a problem just like they do for obstructed view balconies.