I started using Chartmat and could create a product listing within couple of minutes. The platform works without issues. I've used SpreadSimple to create an online shop but found Chartmat more powerful in terms of features and use cases. Of course they're two different products but if Chartmat founders are ambitious enough, which I guess they are, nothing is impossible with Chartmat.

Pros:
- Simple, fast and reliable. I feel that it's very polished, not a beta.
- Data sheets keep being private although you can add teammates to edit the boards but not the data.
- The support is decent. They also listen to their users.

Cons:
- The UI looks 2010s.
- The new Filters works well for data and chart display but not for a modern website. Visitors have to configure the filters than choose the filtered options to display items.
- Markdown block is not full-width.
- Frontend site is cached, which is good for speed, but doesn't update new content immediately after you refresh the browser.

Hope for new features such as:
- Custom CNAME
- More customizations/templates for grid block: pagination, fixed image size,
- SEO
- Sub-pages
- More integrations such as: live chat widgets, google analytics, mailchimp...