Great choice beyond EX items for the standard mage. 2x Cure II worth of MP and a decent MP and HP recovery bonus makes it worth far more then the item actualy costs.
A nice belt choice for any job without refresh, or those that go with the "Quantity over Quality" method of spellcasting. If you have plenty of mp already, get a Penitent's rope or chase after an EX piece, like the JSE ones.