The dedicated Now TV boxes and sticks (which are custom, limited versions of Roku devices) have various live Sky channels, catchup services and boxed sets (depending on which passes you subscribe to). Not everything you can see live is available on catchup (though pretty much everything I watch is). As well as Now TV's own app, the boxes/sticks also have separate apps for the popular free catchup services including iPlayer, ITV Hub, All 4 and Demand 5, as well as Youtube and (with a separate subscription) Netflix. There's no way of recording anything for which catchup is not available via one of the apps. I think everything is 720P at the moment, with 1080P expected in the next few months. Their latest box is 4K-compatible but there isn't much content at the moment - I think just Netflix and some BBC stuff, etc. One of their older boxes has a Freeview HD tuner built in for broadcast TV, but that will be redundant for most users, and I think has been left out of the most recent box. Now TV also works in a desktop browser or a mobile device app, and their Android app supports Chromecast (though the Chromecast will count as a separate device, and you are limited to 4 active devices). If you want to save money on the subscription, multi-month vouchers are available (e.g. from Argos). They also tend to offer you a reduced price if you cancel your subscription. Even if you have no active subscription, the non-Sky catchup apps will continue to work on their boxes and sticks, which is handy if you don't have a recent smart TV.
