Enlarge Person, Greater
Transmutation
Level: Sor/Wiz 3
Components: V, S
Casting time: 1 standard action
Range: Touch
Target: One creature
Duration: 1 min/lvl

Description

Increases target's size by two categories, so a human would become huge, a halfling would become large, and an ogre would become gargantuan. This spell functions as Enlarge Person, except modified in the following ways:
Strength gain from size is +4.
Dexterity penalty from size is -4.
Armor Class penalty from size is -2.
Attack Roll penalty is -2.

original here

So, what to think about this spell? My first thought is the target. It should be limited to humanoids. Aside that, you guys think it's ok?