I dislike the idea of taking away someone's free will, which possession certainly does. The power itself is alright, it's the primary use I dislike. Possession of technology and the like is fine though, as you're not taking over another person.

Terrifyingly powerful ability if allows to control something overpowered, or someone close to heroes.

I find it a little bit more lame than cool

It’s cool, but it makes me uncomfortable.

Basically my stance on it.