Very easy to use, no bugs encountered, and makes it very easy for your users to complete a survey with its tinder style swipes. Easy to set up and integrate, the only downside is the single custom domain, having originally purchased this product I recently upgraded to Tier 4 for multiple CNAME (the original deal had this included years ago at Tier 1) but you still only get a single CNAME, this makes no sense and I hope the creator reconsiders this.