Picked it up yesterday, so I've had a few hours of 'play time' with it. No set-up service was offered or asked for. Just unplugged the HDMI, Ethernet, Aerial & Power from the BT Vision box and plugged them into the Youview box (except power, the Youview box has a captive mains lead unlike the Vision box's fig 8 connector.)
Overall, very happy with it and it's leaps and bounds ahead of my old BT Vision box. It does take a while to come to life, but to be fair I've left mine in 'eco' mode. Apparently the 'rainforests be damned' mode makes it come out of standby much quicker.
Having a Freeview HD tuner for the first time is great (worth it for Rachel Riley in HD alone. 😉 ). Haven't tried recording facility yet, but the catch-up TV seems to work as it should (Plan to watch Michael Palin's 'Brazil' at some point over the weekend). The jury's still out on whether I prefer my TV's tuner or the Youview box for plain old SD broadcasting though.
One thing I can't find either in the manual or in the on-screen guide is any picture adjustability. On my Vision box, I could pick between 1080i or 720p (I preferred the latter), but can't seem to on the Youview box. Colours seem overdone too. Yes, I could adjust the picture settings on the TV, but this would affect the picture when watching the TV tuner (my telly is quite old and doesn't have individual settings for different inputs...... I think....)
Also, my Onkyo displays 'PCM'. not sure if there's any alternative to this as I've not found any audio settings other than language.
One other thing I would like an answer for which I noticed while watching 'The Simpsons' last night. On my TV's tuner, on 'Wide' setting (no auto formatting), it fills the whole screen from corner to corner. Not stretched, not zoomed in, just as it should be. When watching on Youview, there are black bars either side of the screen like an old 4:3 TV. This was the same on C4 & C4HD.
Why would this be?
Overall, I ain't complaining for £50. I'd have paid that for a plain jane freeview HD box, let alone with the extra functionality of recording and iPlayer, and the integrated on demand of BT Vision (which answered my first query whether I'd need both boxes to be connected... You don't).
I'm sure I'll have other findings over time, but I can't think why anyone wouldn't want one if they're sick of extortionate monthly subs fees for Sky or Virgin.