I've had my box for about a month now. The problems I've had so far:
1) It wouldn't switch on while in recording mode. I contacted Humax who told me not to keep pressing the power button as it would send confusing messages to the machine. I should just press it once. I followed their advice and now find that I can mostly get it to come on, but it usually takes several attempts.
2) On one occasion it simply refused to switch on at all even though it wasn't recording anything at the time. I had to unplug it from the wall before I could get it to work.
3) The other night it switched itself off in the middle of a recording.
4) On Demand now won't work - it tells me my LAN connection is OK but there's no internet connection. There is. After asking it to retry anything up to 8 times it tells me that I'm connected but as soon as I go back to On Demand it reverts back to no internet connection. On Demand had been working fine prior to this but as of writing I'm completely unable to use it.
The box I've got is obviously not fit for purpose and I wondering if I should simply return it and try another make or get a replacement 4000T.