The App works as far as we can see- the main issue is with B2B as Shopify do not support B2B's showing prices ex vat.
So there is a solution using Merchant centre rules.
You will need to create a Rule in the Google Merchant centre.
Sign into Google Merchant Centre and go to Products then Feeds and click on your feed name. At the top select Rules. Click on Create Rule and search for Price within the pop-up box and select it. Price not Sale price
On the Edit Rule screen click on Conditions under Edit source. Type Price and then select the value for your Price under the Feed Attributes heading at the bottom.
From the contains drop down select is greater than and then add 0 in the Type Click on the Set to box below and select your Feed- with Shopify this is an API.
The next step is add a price modification and so click Add Modification. Select Advanced operators (4th box with dots) and then Calculate. From the Arithmetic operator drop drown choose Multiply By x and enter 1.2 and click on the value in the Applied Value box.
Once you have done this select Save as Draft and then click Test Changes
This takes between 10-20 minutes- when done Test it and you are happy with new Feed-so prices increase by 20% and all good click apply.
Changes take 2 hours plus to take effect in Merchant centre-they state.
So far it seems fine, other than there's no search. If you have 100's of products how can you search and see if that product is approved and listed. You can't sift through pages and pages looking for it.
No one is mentioning that we received an email from Shopify saying we had no choice but had to make this move before end of Jan 2018. This page says it's beta. But we were told we had no choice and had to move and the other google shopping app was being disconnected.
Vianney Home Decor
I need to be able to change the GTIN because is rejecting all my products for that.
The google category is not that cool, not complete.
The merchant center link is not clear.
ONE SUPER IMPORTANT THING IS LABELS, WITHOUT THEM I CANNOT MAKE MY STRATEGY GOOD.
Many things to improve, hope you hear this comments because this is one of the first sales channels.
Does not work easily with Shopify Buy Buttons! :/ (you have to have a Shopify hosted store). I would hope that Shopify would support their own Buy Buttons for something as useful as Google Shopping ads. WORKAROUND: I enabled a Shopify Store, then I put a redirect script in the theme and matched all product urls on my wordpress site. Now Google is enabled and all traffic is redirected to my site.