Enchantment / Limited Use

Has anyone seen anything like a limitation for enchantments that limit a magic item to # Uses per Day? The 'Limited Use' limitation for advantages is -40% for '1 Use per Day'. Does this sound reasonable? The item would still be permanently magical, it would simply work 'Once per day' or 'Twice per day' or whatever. And if the item casts the spell, then the wearer or user could maintain the spell if they pay the fatigue cost, meaning that spells like 'Warmth', that last for one hour, could be maintained all day long provided the wearer's activity level allowed the regaining of fatigue.



Any thoughts?

Enchantment / Limited Use