A shame, I like YouView
It would be terrible shame if ongoing development stopped for YouView. I'm one of the few who have actually bought a YouView box directly (albeit BT branded but otherwise almost identical to the Humax box. Bought from currys on offer for £150ish quid whereas the humax brand sat next to it was well over £200.)
I don't have BT or TalkTalk or NowTV so can't comment on how good those are, but the free-to-air stuff is great.
I find it very reliable, good quality (although SD output sometimes is not quite on par with my previous box). The recording timings have been bang on and never had one missed. The UI is quite nice although sometimes less than instant (probably due to pulling everything over the internet as you rather than pre-caching). It would be nice if there were more pluginable channels (Roku style) but otherwise I would highly recommend it.
It's far far better than our previous boxes and has just worked flawlessly since we got it just after Christmas. The android app which allows you to set recordings remotely is handy as well (don't know if any competitors offer that?)