I've tried the Super Classic hard tension carbon set about one year ago. The basses were great, good bottom, fine - but never thin - brilliance, long life span. It's a really fat sound. The trebles, indeed, were (in my ears) rubbish. It sounded to me a bit like some sort of cheap plastic. Nevertheless, the basses are definitely a very good choice for classical music. Especially compared to Savarez Corum Alliance basses (ex works strings of my Hanika), it was an enrichment at all points!
BUT: for my kind of music (Jazz/Latin) the enhancement of low and high frequencies is too distinctive. I prefer strings without a strong bass/treble enhancement (= a bit of "electric" sound) and I found GHS 2500 nickelwound strings to be my favourites. Moreover, GHS nickels even last longer than Pyramid sterlings, squeaking is reduced and the price is less than 50%