Originally Posted by mega94all

So.... worth or not ?

Nope.
1. It only goes into the Bracelet slot, not into the special equipment slot.
2. It doesn't stack with abilities increasing crystal drop (which is not too uncommon, so with picking certain units, you easily get way more crystals to drop).
3. No stats.
4. You can't upgrade it (yes, it is stuck at lvl 1 forever!), so it won't get any +def or +atk that way either.
5. Even if you like to use your Solar Blast, 15% is hardly noticable. It becomes noticable once you get over about 50%, which is impossible using this bracelet, since it doesn't stack.