Wix seems to get a lot of hate here. As a non-designer, I struggle to nail people down on EXACTLY what is bad about the site.
For me, the big downside is that anyone can make their own site, which means people who don't know design end up with a dull template OR a design of their own that stinks.
It puts web design in the hands of people who have no business designing sites.
However, if a user has a keen eye for design and doesn't need to complex a site, what is the problem with using Wix?
EDIT: I think I have a better understanding now of the problems a designers have with. Broadly speaking, I see a lot of parallels between this issue and publishing/self-publishing. A lot of publishers get very annoyed with self-published books. The quality is low, they are packed full of mistakes and they price traditional publishers out of the business. However, publishers have had to learn to suck it up and learn to live in a DIY world. Perhaps web designers will too.