Running shoes question

Hi, I just got some Saucony Endorphins speed 3s and the running store said they would be okay for my runs, but now looking everywhere is saying that they are for speed runs and race day, but I already bought them and I’m worried they won’t be good. I’m training for my first marathon and I wanted them to do my training runs in and even possibly race in. If anyone has had them or knows anything? Thank you!