Decent set of strings, on the pricier side if you compare to the alternatives. I had two sets of these, luckily, on one of the sets the A-string broke while I tried to tune it for the first time. I don't know if I can blame my instrument or something else but the 2nd set worked just fine.
These EJ99-series of strings seems to require a lot more stretching than usual before they're stable. They have a silky feel which I believe is a better feel than other normal cheap strings I've used before.
I used standard white nylon strings before and I honestly can't hear any big difference, at least not to the extent that it justifies almost the double price.