These strings are unbelievably good for the price. I fitted a set to my 1974 Esperanza 700 this morning and tonight after only 4-5 re-tensions they are holding pitch and sounding great. Resonant basses, warm trebles and good transition from bass to treble across the G third.
I also have a set of HSS Supremes which I haven't tried yet, but if these HCS strings sound so good then I am expecting the HSS to sound, as their name implies, supreme! So watch out for my review.