In both this post and the previous post you emphasized that the product has to be reliable: “you can’t ship trash”. I completely agree.
In my view the hierarchy is: reliability, core features and user interface. It doesn’t matter how cool your product looks if the core features and reliability are not there. Much as I love beautiful design, I will always trade beautiful design for reliability and core features.
Rather than a cool user interface (or user experience) it’s better to have something that’s blazingly obviously. For example, rather than a “hamburger” menu button, a button labeled “menu”.
For what it’s worth, here’s my take on the Minimum Viable Product.