I have one set up at home to watch the lakers and dodgers (yes I have time warner cable, if your from LA you know what all this is about) in Calif and a 20 mg there and 3 mg in Sosua connections. You can watch a movie but sports (moving action) is iffy. So unless you have a tons of bandwidth in Sosua (minimum 3 mg) and NOT expectingHD quality it will be ok for movies.
hope that helps,
singletravel