I have been using psp since 2007 and below is my review.
User friendly - psp can easily get understand, it also has a about section which can explain how to use psp but the internet browsing in psp is very difficult anyone can easily get confuses so I give 2 star out of 5.
Features/function- some of the features are very amazing and some of them function are useless i.e we can also access internet from psp, we can connect psp to computer and play the games of psp in computer through data cable but its accessories are expensive for e.g cost of 2 gb memory card is around 2000rs and you cannot play games by downloading, you have to purchase its cd( umd) which is highly expensive. in terms of feature I give 2 star.
style and design - psp can defeat any gaming console in style and design specially its joystick is amazing and the corners also, in terms of style I give 4 star.
service & support - service is poor in india if somehow your psp get any technical issue so you will hardly found any technician to solve its, so I will give 1 star out of 5.
value for money - if you are belong from medium family then psp is not worth it because price of psp is around 8000rs and price of its 1 game is rs1500 but in 2017 era you can play almost every game in PC so you dont need psp nowadays , it is highly expensive though.so I give 2 star out of 5.