Go somewhere else if you can. There's a professional way to say we bought a lemon, and then there's what this mechanic did. He brought us back in the garage where our car was and showed us what was wrong, so this was helpful and I appreciated it. But he was practically rubbing it in our faces that we bought a lemon. Saying condescending things like "I don't know what you guys were thinking, buying this sh%t" and making it a very unpleasant, tense experience. We even told him that we had a certified mechanic look at it before buying. We aren't all seasoned mechanics with 20+ years of experience. I think he felt he could get away with berating us because we are young adults. I hope all mechanics aren't this rude.
Edit: seems they saw this review because the mechanic called and apologized for his rude behavior, turns out the car isn't a lemon(!) and will charge us for only one hour of labor vs three since it was only a wiring issue and they should have started with that.