Those strings are good, but they lost their "day 1 sound" very fast (in about 3 or 4 weeks). I have had gauges which sounded better after this time.
But the quality remained - I did not change the strings yet and still have those on my guitar (after around 4-5 months or so). They play very well altough the sound isn't that good as before - which does not mean it is bad at all. Just not as good as before.
You don't need to have any concerns about buying these, the EJ10s are good and affordable strings!
* Ceny zawierają podatek VAT. Do ceny artykułu(ów) należy doliczyć koszty wysyłki. Oferty ważne do wyczerpania zapasów. Za błędy w opisie i innego rodzaju pomyłki nie ponosimy odpowiedzialności. CK=Cena katalogowa produktu