Lassa Snoways 2+

Moin! Since my two rear tires had bumps (Conti Wintercontact) had to get new ones today ( Renault CLio 97Bj). Werktstatt called quickly at the next tyre dealer at the still 2 Lassa Snowways 2+ tires there had (35€ / St.). Now after mounted/wounded I just made myself smart on the Internet and am a little worried. Users give the tire on average the mark 2.57, but in general in many forums or the normal Snoways2 (without plus ) with flaws Reviewed by ADAC. Do I have to be worried now? There are two completely new tyres mounted in the rear. Thank you for your answer.