The +: a new gaming experience, the physical introduction into I play, good accuracy, fairly intuitive to use
The -: Few are consistent with this technology (not enough title), games "require" often buying an accessory to play properly (pistol, archery, snowshoeing), the purchase of a station recharging becomes almost mandatory, the facilities are a bit pricey (it would packs financially advantageous equipment) because we want to play more, titles are alike.
In summary, the Ps Move is a real improvement in the gaming experience, but the technology is not sufficiently exploited. You have to buy this accessory in the idea of playing particular songs (known in advance) in any case to test the experience.