I reluctantly used a half set of UC as I'd run out of my normal strings. I stand by previous comments on this. This string is all-round one of the crappest polys on the market. If plays great for such a short amount of time as to be ludicrous - barely a couple of hours before falling off a cliff in tension and feel.
As someone who gets lots of string-jobs done a year if you like the starting characteristics of this string just change to the Blue Rock 'n Power. It's got everything spin-wise that UC has but does everything else better - tension maintenance, feel, playing-life performance curve (feel and power).
Plus, it's blue so you look better too.