Reason I quote myself is because, I was handed a racquet strung with BG66 UM (supposedly) but it was BG66 Maxima...a month and a half ago. Well, just very recently (within the span of a week), I've accumulated about 6 hours of play with BG66 UM (this time I checked) and it beats Zymax 62/67 and NBG98 generally speaking but still the durability of NBG98 is best because I broke one of my racquet's string strung with Ultimax in 3 hours and Zymax 62 is just pathetic in the durability section! I don't know about the soon to be released improved version of the Zymax 62/67 though. However, I think I will stick with Ultimax and NBG98 for same spec racquets strung at 28 lbs. until further testing in the meantime. Might try the improved Zymax version as well. Mods, please delete this double post, sticky hands, sorry.