S.B.
Sending your 3-month old to Kindercare would be fine, BUT it really depends upon which one you go to, some are much better run than others. My daughter currently attends one, and if my sister didn't work there I would be taking her somewhere else - but really, I don't think that's Kindercare only, all daycares are going to have their issues.
My advice is to spend time there before you commit, see how the teachers and management interact, get to know the teachers your son will be with, ask about things that are important to you.
Good luck.