The Sky powered NowTV free trial lasts for 14 days, and it does not require the Nowtv box as it works on your computer and other devices such as the Ipad.
Previously Nowtv had just one free trial to one sertv ice, however Nowtv over the last few years have introduced passes for different genres. You will have the choice of having a free trial to different passes such as Movies, Kids, Entertainment and Sport, or you can choose them all. Just be careful of the billing that follows at the end if you sign up for them all.
Its advantage over other such services is that it has all the latest shows that are on sky Tv, so is effectively like having all the best of Sky.
Unfortunately it is only available for UK internet users, however on our own review it has the most up to date Movies and Tv.