UPDATE: I have had this for about 2 and a half years now. I have had relatively few problems. I have found that it does lock up and freeze but this only happens when the disk is nearly full. Deleting a few programmes does the trick. The box, like all of them, does suffer from forgetting to record programmes when re-tuned. You have to re-reserve the programmes you want to record after a major re-tune. I think this is beacause the box understands channel numbers and not channel names so can't follow a station if it wanders around. The Panasonic that I have has the same problem but its a bit more forthright in its warning about re-tuning meaning it needs to be re-programmed.
I bought it in December 2008. Here is what I wrote after 2 weeks (and I have not changed my mind!)
A great buy at just over £100, and only a little more than a plain set top box. I did a lot of research, and the Humax comes out top for a dual tuner freeview recorder. Now its not perfect, but it has the following advantages: from other reviews, its more reliable; Series link and automatic timing are really great and simple to use. A couple of button presses and you will never miss an East Enders episode again. There have been some grumbles about fan noise, mine is in the lounge and the PC in the other corner is much noisier, I think Humax may have fixed this since it was first raised, as I do not find it an issue at all.
Reception: it should be obvious from reviews and forums (actually fora) like Digital spy that you need good (not fantastic, but good) reception from a roof-top aerial for any freeview box. A TV top aerial won't give you what you want, and a proper aerial fitted on the roof is absolutely necessary.
To help you decide wif this is for you, this PVR/DTR replaces two old VHS recorders that you use for "time shift" recording (record something and watch later or a different day), this is for you. A temporary recording is also made whenever you are watching something, so you can hit the pause key and suddenly you are not watching live TV but the recording.
On the other hand, if you want to record a film, edit out the commercials and save it to a DVD, buy the Panasonic. It only has one freeview tuner, but a DVD writer, and its even easier than the Humax to use.
Throw your VHS tape recorder (VCR) away and buy one of these boxes now. Don't bother with the larger 9300T. It has double the capacity, but if you have recorded more than 100 hours of TV, when are you going to watch it? 100 hours is a lot of telly!
Series link: you select a programme in the future using the guide. The box asks you if you want the whole series. Select Yes and now not just the Monday episode is selected but any programme with the same name on the same channel will always be recorded.
Auto Timing: Don't add extra minutes to the start and end of the programme, tell the box to record the exact programme (this is the default anyway). If the programme is delayed, advanced or otherwise re-scheduled, the Humax just records it at the new time. Not the old time. Exact timing does not miss anything - East Enders doesn't record the music, but you see the title screen disappearing as it starts (or cut to first few words if it was on standby).
Pause live TV: Just press the pause button and what you were watching is frozen. Once you restart, by pressing Play, then you are watching a temporary recording. You can rewind it fast forward, etc. all while it is recording the rest of the programme (and anotehr channel as well).
All this but only 4 stars? Okay, it is not perfect. The guide is not as good as the Panasonic and I have not found how to make it automatically go over things, like the Panasonic - so recording Monday's East Enders should over-write the episode from Monday before. No option in the Humax.
These are all extra features that would be nice, don't be put off by them. Buy this machine.