Infiniti2000 said:What do you mean, "seem to work?"
You have to rest for 8 hours before you can prepare spells.
You have to burn this incense and meditate for 8 hours before preparing your spells.
Seems very similar yes?

I dont see it as reading that you get your spells back while meditating for 8 hours. You meditate for 8 hours and 'then' you do the normal thing to get your spells back.
Personally, it doesnt matter if this item is used for both or not, it is incredibly powerful either way and I would likely have to limit it in some fashion for my own games.
However, as written it definately looks like it would be nice for the theurge. We only have a few conditions:
1) must be lit by a divine caster
2) must remain within a certain range and meditate for 8 hours
3) must then prepare spells
= all spells prepared are maximized.
I think that if they had wanted it to be all divine they would have simply said so. It could be looked at as a simple editorial mistake since it is really only one word of difference, or perhaps they meant for anyone who multiclassed into divine to be able to take advantage of it.
I did misread your example earlier, which is unfortunate ;/ I had simply thought you meant it only worked on healing spells ( I think it worked in this way in previous editions, that is why I thought I was missing something). If it was limited to only healing spells, or only spells of the healing subschool then I doubt I'd have any problem with it at all. It might even be a bit expensive for what it does. But even all divine spells would be pretty tough (druid, maximised and empowered flame strike? or call lightning? ouch)