Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I loved the addition of AIVAS to the storyline!

All the Weyrs of Pern is a great book for anybody who has read Dragonflight, Dragonquest, The White Dragon, and Dragonsdawn (all 4 have to be read or you won't understand much about it).Anyway, AIVAS was a great addition to the world of Pern, but I find the change in Lessa and F'lar a little saddening. I know people age, but it seems that their personalities have aged, also. Lessa appears far too engrossed with her Weyrwomanity for my likes, although she used to be one of my favorite characters.The book stars out with a slower tempo, but it picks it up as it goes along. As with all books, don't let the first chapter force you into putting the book down, but read at least half of it before you make your decision.