Hi Leo,
I've been a HUGE fan of ATV since 2012 with my first iPhone. I bought the ATV4 for its apps - particularly WSL World Surf League, Vimeo and RedBull Sports. We are not TV watchers - usually 15minutes a day over late evening dinner with a once a week/fortnight late film showing.
I buy films on Vimeo and iTunes along with ReelHouse. I Airplay HD surfing videos from the iPhone along with my music and Ibiza Sonica.
The great thing about ATV4 is that it handles 60 frames per second video (iPhone home videos for example).
It's performance is flawless. Picture & sound are superb. The remote is excellent too with the typical Apple excellence of trackpad.
You got a great deal. Because the £ is so poor, all Apple prices have risen here in the UK so it is rather overpriced but it's a quality piece of kit.
We very rarely use the DVD player etc now. We don't watch mainstream english channels on other boxes etc.
All in all the ATV4 along with iPhone combination have been a really superb, worry free experience. Flawless.