It's not worth 150.
It is however, well worth $100 or so. The last time I had so much fun playing a JRPG was Tales of Symphonia/Pokemon Silver.
It might not have the best story, the best combat, the best world or whatever, but it really throws away some of the archaic systems JRPGs have been polluted by for years and really nails the aspect of interaction with the world. (Seriously that Affinity map needs to be in every game. Brings the relationship between people of the world to life)
If I'm not mistaken, it's also the best rated JRPG for the 7th gen going by review scores. Wasn't it ranked #1 by Japan some time ago? And I believe it has the highest meta for a 7th gen JRPG too.