Having just finished Primal, it's one of the most intriguing 3/5's I've ever played. Jen and Scree are great, fitting the shoes of a bantering 6th gen duo on par with Ratchet & Clank. SCE Cambridge made some breathtaking environments for a PS2 game, Aetha being home to some of the most jaw dropping gothic architecture of the 6th gen. It's such a shame the glue holding Primal together is some of the most cumbersome exploration and combat I've had the displeasure of playing.
Don't let that deter you from checking it out, as the story and characters are well worth the price of admission. Sony should give this game the attention it deserves in the form of a remake whenever the Last of Us' udders run dry.