Just an update on the Roku3 box & NowTV.
Works fine - much snappier than the Sky box we have (2011 vintage).
The EPG for live TV isn't as good but that's not surprising given how much Sky have spent on the EPG. It may be that the NowTV branded version of the Roku3 has a better EPG but I dunno as I haven't seen a review of the NowTV box with the v3 hardware.
All of the boxsets which Sky charged an extra fiver/month on Sky TV are present & correct
I think the really salient point is that the Sky box hasn't been turned on for anything other than (oldish) recordings since the Roku box turned up.
Netflix works fine as do the catchup services for terrestrial UK TV.
Time to bin Sky TV & save £20/month while still having the same channels plus boxsets we don't have now. I shall look forward to the rententions convo where I explain they're going to actually have to pay me a couple of quid a month to keep Sky TV - bet that's not a 12 month contract

Nice having a remote that doesn't have 30 buttons on it as well. Oh & the remote is wireless, not IR so you can point it at Mars & it'll still work.
I like this Roku3 box - do note I have it on a wired network, not tried the wireless network connection.