I almost never used it, because in my opinion there's better spells to spend the points on, but here's my opinion about it :
Pros :
- Actually works as intended and doesn't rely on luck
(So rare thing in Regnum to be noticed)
- First spell in Sorcery tree, cheap to get
- Low mana cost
Cons :
- Long casting time
- Dur != CD
- Makes you shine like a lightbulb = more targeted/MS'd
- One more buff to cycle, as if barrier, devotion, karma and mind blank weren't enough.
- Need high armor points for it to have a decent effect
- And yet still isn't tremendously effective, especially versus high damage dealers (partially thanks to the fixed damage reduction armor)
So I think it's nice in PvPish scenarios, but in RvR you'll still die in a split second no matter you use this spell or not if you don't pay attention.