Fast and good support. A little bit expensive but thats the price of greatness.
I recommend this app.
I have used Mageworx apps in Magento, so decided to give this Shopify app a try despite the fact that it was new and had no reviews yet. Our custom Shopify theme needed a bit of help to make the price grid show, and the Mageworx support team was very friendly and quick to help. It is all working well now and they even helped me format the price grid to fit the style of our page. (In fairness, a bit more guidance in their documentation about the customized CSS for the grid might have meant I didn't need their help. But the rest of the documentation was good and the app works well and has a very professional interface.)