Main features:
Replay tasks - Record unmoderated studies, capture video as users complete specific tasks directly on your website.
Replay visitor - Watch recordings or realtime videos of visitors browsing your website. Filter visitors based on any path or action they could possibly take on your site.
TreeTest - Measure the effectiveness of your website structure and labeling against real user tasks. Get Real user insight to help you evaluate which parts of your content hierarchy work well and which parts don't.
CardSort - Find out how other people would group and label content on your web. Card sorting will help you to understand the product groups or categories that customers would sort items into and thus where they'd expect to find them in your web structure.
Comments and Reviews
We have very good experiences with this tool. We use mainly task driven studies.