Always save!You get last 10 frags for free,sooner or later,no point to spend coupons on it.It's kinda boring to hold on every single coupon you can get,but believe me,is worth it.I saved for over 3 months,get 25k,and with that amount,I finished summer Kakashi,summer Kurenai,almost 4 stars Bee 8 tails,get rinne Sasuke,and still have to choose either new year Hashi or GNW Madara from boxes.+over 15k power.