How "good" is a caster shield?

[silverwolfer]

Caster’s Shield: This +1 light wooden shield has a small leather strip on the back on which a spellcaster can scribe a single spell as on a scroll. A spell so scribed has only half the base raw material cost. Experience point and component costs remain the same. The strip cannot accommodate spells of higher than 3rd level. The strip is reusable.
A random caster ’s shield has a 50% chance of having a single medium scroll spell on it. The spell is divine (01–80 on d%) or arcane (81–100).
A caster’s shield has a 5% arcane spell failure chance.
Moderate abjuration; CL 6th; Craft Magic Arms and Armor, Scribe Scroll, creator must be at least 6th level; Price 3,153 gp (plus the value of the scroll spell if one is currently scribed); Cost 1,653 gp + 120 XP.



how "good" is a caster shield? Is it one of those nich ...eh...things , or something you hide behind it and start casting other random spells?

[Gildedragon]

I personally like it for factotums; offloading spells is handy.
It is nicer still when do crafting costs are not in play.

[silverwolfer]

Could this logic be put to use, if you just find some random scrolls in the adveenture and ducttape it over the allowed spot.

[Gildedragon]

Best to duct-tape it over someone else's shield; the scroll will be consumed though. But the existence of the caster shield means that characters could read the scroll there stuck. (Guess that scrolls 4th level or higher might be too long?)