Watched movies on my iOS device with the latest version installed of both operating system and the United app on a 737-900 and ERJ-175. U.I. was very straightforward and movie selection was good, but had lots of interruptions and buffering on these 4 hour flights. Pretty much gave up trying to watch on outbound, but did manage to make it through a movie with few interruptions on the return. Only seemed to work well if you never pause or try to replay a scene. Especially with no tablet holders, still think this is a poor substitute for seatback IFE.