In my opinion, RAINBOW is one of her best albums (one of my favs after I am...). For me, her low point wud be when she released Secret, the songs just didn't sit well with me. However, unlike many people, GUILTY has some of my favourite songs (Marionette, talkin 2' myself, etc) and is one of my favourite albums. Most of her earlier works are the best, but I do agree with most people, Ayu has gone down in quality and creativity.
But she's still the best
