The other reviews pretty much give you the gist of this app so I wont go into too much detail on its layout.
Connecting to the drive, pretty straightforward although the connection at time seems "flimsy"
Video playback (for me the major but not only use of this drive) - does not support audio for Matroska files so thats a bummer but not a deal breaker. Its not the smoothest video player but it gets the job done. However to date I have not been able to watch a single video to conclusion as the app continues to crash regularly. Downloading and trying to open on another installed player ... This is where things get even less pleasant. Downloading takes an enormously long time and usually fails due to app crashing.
All in all, this is something sorely needed for the phones without a medium to transfer outside of itunes and it works for sharing files between multiple users, the app itself is unstable and prone to crashes. Ill post a more comprehensive review once I use this app/stick more.