It is pretty simple UI, and everything is there, no hidden feature. I found nothing to dislike about TrialRun. It is pretty affordable, so we bought one. The UI is intuitive and easy to learn. We tested with 5 different customers which we found in TrialRun. I like how easy it was for our team to set up an A/B test with a variety of content options. Our marketing teams were able to quickly build out new campaigns, assign them to different tests, and then collect data to make informed decisions. The interface could be a bit more streamlined for some users, but this isn't a major drawback. We have used Trial Run to learn which pages perform well in the app category, so we can focus our marketing efforts on those areas.