The reward-gear was useless (significantly less powerful than the reward set I got ages ago which is less than half its level), save for adding a little cash which I desperately need due to the unreasonable amounts it takes to upgrade girls these days.

Added to that, seven days are not enough time to reliably (or at all in my case) get the Halloween Juliette drop, due to the dodgy drop rates for girls in battles.

Overall, the Halloween event this year seems to have been decidedly half-arsed in implementation; the only use it's had for me is in providing more daily missions with gold-currency rewards. Thanks to the fact that the Epic Pachinko doesn't prioritise event girls anymore, I couldn't even get one that way...

Presumably for Christmas we'll get a set of Common items and a total of about two days to try for the event girl, judging by this example.