It looks terrific on my Xi's, that is beautiful blue.
They do have other colors in badminton strings and should launch a red string for all their red racquets. I don't think they're worried about prestige users, lol.
Back to the topic, poly tour spin string is maybe the best string on the market right now.
2X VCore Tour F with 6g at 12 o'clock ---Yonex PC Light. Stan is the MAN.