We use VWO across two markets. It helps us extend a test beyond the fundamental of AB Test. It has a 360-degree view of funnel and goal. Each test can be customized depending on traffic volume and specific to its conversion rate. As no pages value are equal, it makes sense to adjust conversion or improvements as you'd expect. It solves the issue of a number of concurrent tests you can run on the case of Google Optimise. Solves some flicker issues and nuances you get from using free testing tools. Tool also helps us from hypothesis to agile recording of insights and conversions to implementation, reporting and insights.
The segments are a very good feature of VWO, as one of our brands is exposed to mobile, with more than 80% of visitors coming from a mobile device, segmentation really helps us improve our lead and conversion rate.