By and large it's an excellent product but we have had one issue crop up.
In the last week we noticed a problem with playback of TV3. This only occured when we were recording 2 channels while watching a recorded TV3 program. The box would drop the odd frame causing a slight stutter in playback. Really strange. It only occurs on TV3 program which I guess is caused by the superior picture / sound signal which they send being harder for the reciever to decode.
I took it back to JB Hifi this morning and they have replaced it. No trying to blame me for the boxes problems, no dramas, just replaced it. Really good service. I'll be interested to see tonight how the replacement box goes.