Instruct: Classify Amazon reviews into positive or negative sentiment
Query: great...but could have been much better

this special was amazing. i am really 16, and have always been a fan of creatures from before dinosaur supremacy. however, i think 90 minutes is far too short for such a huge amount of life. most of the time periods up until the early Permian were skimmed over, and the Ordovician period was completely passed over, without a word said.also, there were many creatures that i was disapointed not to see get re-created in this special. a few apperences, such as Gorgonops, Dimetrodon, Edaphosaurus, Euparkeria, Pterygotus, etc, i was happy to see. however, i was dissapointed when i did not see Icthyostega, Estemmenosuchus, Protorosaurus(earliest known archosaur), and many more creatures that i would like to know more about.it is good, for 90 minutes, but if the creators were to re-create it as a four hour special, it could become something truly spectacular.