The only problem with their ads feature is that you are competing with everyone else and they take a good chunk of your money. Say someone clicks on a competitor but found you, they still charge the ad fees because you were “found” through ads whether they were yours or not. And if you sell over $10,000 a year, you have no choice but to be in it, which I don’t like.
I started building my Shopify site the last couple weeks. I’m almost done with it, and I’ll be ready to launch. Figuring out traffic will be the hard part.