thin gauge strings seems to be the rage right now. with both Yonex and Ashaway coming out thin gauge strings like the NBG98 (0.66mm), BG66UM (0.65mm), and Ashaway trump them with ZM62 (0.62mm) i have been enjoying the ZM62 lately. ZM62 is very good at medium tension (~24lbs) but really excels at higher tension (27lbs). the feel is stiff and excellent touch. however, durability is a big concern even at $4/pop i have recently gotten myself some BG66UM and NBG98. will try to A/B compare them with each other. while the cost is higher, a potential better durability might make it worthwhile compared to ZM62. meanwhile, if you have any comparisons between these, please do share.