Tango fundamentals Great intro to Argentine Tango. Very clear and easy to understand. Unable to get it working on my laptop yet. Fine on Android phone and tablet.
As some others have said, it would be good to make some videos free instead of just having the 'preview'. Also it's not clear that there is a preview. Move it down to the top of the video list instead. The interface could use some cleanup too, it looks dated. The preview videos themselves seem good. Just the rest of the app needs work.
No Free Content None of the lessons were free or available for review before having to make a purchase.