Instruct: Classify Amazon reviews into positive or negative sentiment
Query: playstation portable

this system is amazing. the graphics are great. the games are good. and you can get online. but the nintendo ds can play the playstation portable games. and the psp's screen can easily get scratched. and the price is kind of high. what i suggest is that sony should lower the price. and make it so the screen does not get scrathed. other then that it is a great system. the release date of this system in th U.S. is march 24th 2005. [...]