I've had one of these for a few months. I bought it to replace a cheap and nasty supernet pvr that I'd bought from ebay a couple of years earlier.
I also had problems losing sound on recordings that were in HD. I worked out that my output settings to the TV were wrong. The output has to be either 720p or 1080i to play HD recordings with sound (mine was set at 576i). The sound seems fine now. Even though I have a full HD LCD TV I've decided to use 720p as an output because it's the 'native resolution' of HD TV and I figured that making the unit upscale to 1080 would make it less reliable.
This unit does not appear to have any editing function. This is very frustrating when you make a single long recording (i.e. like recording an evening's tv programs so you can go out). It appears there is no way to split the recording into separate shows and no way to delete part of it. Manual is very very average.
