Chrono Cross is a great game. Diferent from Trigger in many ways, but still is a really good game. Some people get mad about the new battle system (similar to Xenogear, without the combos) and for the lack o multiple techs or for the complex plot. For me Trigger - Cross are just one story divided in two volumes, diferent one from another, but i suggest you if you like the story in Chrono Trigger then play and finish Cross, so you can enjoy of a beautiful plot.
Besides Cross have great music and graphic too, in fact can be anything but a bad game.