dutchdev

I stand corrected. After installing the update, the dashboard will still display the wrong information (twice the amount of products), but after adding a product the dashboard displays the correct information.

The changelog for 3.9.1 says:
Bug fix: and incorrect value for products out of stock was show on the dashboard

I installed 3.9.1.1 and I can verify that this bug has NOT been fixed with this release.

Imo it isn’t particularly suitable for mobile screens. It takes up a lot of screen and when scrolling your productloop it partly obscures the products. Imo you are much better off with a sticky footer that has a cart-icon (storefront default) when using WC on mobile.
I like it for desktops and tablets though, that’s why I enabled the plugin and then hidden it for mobile with the following CSS:

@media only screen and (max-width:481px){
div.right.cart-tab.light.visible{
display: none;
}
}