Default [Q] New N3, but Should I update to kitkat

Hi All
Just unpacked my new unlocked UK/EU Note 3 and its still on its 1st charge, however, I traded my S4 when I upgraded my contract and the KK on the S4 was abysmal and buggeed...

Question:

Is KK on the Note 3 as broken and would you recommend me to update to 442 or just flash the latest 4.3 in ODIN

Thanks