VWO is being used within the marketing team to help improve on-site user-experience, increasing brand advocacy, and helping to deliver continual conversion rate improvements for our lead generation campaigns.
On average we have 5-10 concurrent tests working on different user journeys. Not all tests work but when they do they dramatically reduce our costs and when they don't we learn a little more about why.
Compared to Google Optimize this aspect of the tool is light years ahead. Very easy to change things with the WYSIWYG editor and when it's not possible its easy to jump into HTML edit mode. Also, the fact that you get no flicker on page load is very impressive.