Good question! All web developers hear this one a lot, and the answer is either really simple, or really complicated, depending on your point of view.
They are solid systems and do provide a decent service if you’re looking for something simple and self-managed; but you don’t get any control over the code or hosting. That means no customization, no additional functionality and limited control over the design. In addition, when you hire us, you get a Web Developer; that’s experience with code, experience with optimization and experience with setting up your site for Google and Bing. You are not a web designer, and you need to ask yourself if it’s worth the immense amount of time required to learn and execute things like basic web site standards and SEO, while taking a gamble on the question of “will it work?”. That said, if price-point is a concern; by all means, dive in. I’ll be here when you’re ready to upgrade to a more professional and customized solution, rather than a static site.
With that said, the majority of our clients are refugees from Wix that are unhappy with the service and looking for something better.