I used these to replace the original strings of the Thomann Classic Guitar S 4/4 (Hannabach) since they broke on the first tuning.
I had to do my first ever restringing and it was a fairly simple ordeal. Tuned fine and seems stable. The black colour of the trebles is a nice addition to the guitar.
I haven't used any other strings yet so I cannot tell if the sound is good or bad compared to others, but it surely doesn't sound bad to my ears.
I like D'Addarios packaging aswell, feels premium with that 'seal' of theirs to keep the strings fresh. Also you can get points on their website if you register your package of strings (which in hand can be traded for new strings once you have enough) .