I admit that I have an old Topfield PVR so any Humax is very primitive in comparison.
What Humax 2000T lacks is:-
No recycle bin
No channel swap button ( the back button didn't seem to do this as with the (9300T
No A-B function
No Picture in Picture
No front panel display so requiring TV to be on to see what is happening
Neither Skip nor rewind works in live audio(radio) mode
I have had it only a few hours now so there may be more cons. I also have a Humax 9300T which has all the above except a recycle bin so. The added extras of TV Portal,ethernet connection etc. are nice if one uses them.
What is good is that there is no fan noise, no ventilation slots on top and it stays very cool, in fact cold.