What are these boxes like? I've seen a video on youtube and I know the boot time is quite long but is the box fast enough when it's fully booted up?

What are the zap times like and the speed when accessing the epg? Does it take a few seconds to load the epg or is it instant?

I'm thinking about one for a relative but I don't what them getting frustrated by lag as they will be doing all there channel changes through the 7 day epg.

Any opinions appreciated.