Jean's suggestion is a good one that is wroth repeating. Some people only feel the need to give feedback when there's something negative to report. This can lead to some to reviews being skewed and hurt sales. This time of year, show your appreciation and encouragement for your favorite developers, authors, podcasters and other content creators by sending them a note or leaving a comment or review in iTunes, the Mac App Store or Amazon. It really does help and leaves them with a warm fuzzy feeling inside.