OK no doubt people have asked this question before and had it answered. But doesn't the Craft Rings feat seem ridiculously hard to attain compared to what it does. Looking at the table of magical effects in the Tomb and Blood and DMG books it seems that any effect that can be placed into a magical ring can also be put into a wonderous Item, a ability that is attainable at 3rd level (as opposed to 12th) and would seem to make the rings feat just a way to get use of 2 extra magic item 'slots' on a person (bearing in mind the 12-15 other slots available). It seems to me that if a caster was of the level were his wonderous items filled every slot but his ring slots it would be easier to simply pay the double cost for making unlimited items.
Also whilst I'm on this topic. Wands can only use 1 spell, staves can use multiple spell within themselves. Rods seem to be largely covered again by Craft Wonderous Item or other feats what makes Rods special?
Also whilst I'm on this topic. Wands can only use 1 spell, staves can use multiple spell within themselves. Rods seem to be largely covered again by Craft Wonderous Item or other feats what makes Rods special?