These seem only useful to swap in while resting your Puppet's MP, but meh, this is the only item in game that increases an Automaton's MP recovered while healing, but unfortunately this is a stat that has to be stacked like Haste to make it really useful.
I'd use a +Evasion Headpiece like Emperor's/Empress hairpin or Compound Eye circlet or Optical hat (+10 Acc/+10 Evasion) full time over this.
You can use it if you have the inventory, but mine will probably collect dust in my Mog House.
Edited, Jan 13th 2007 4:04pm by Aerix