Sony DHG-HDD250 30-Hour High-Definition Digital Video Recorder (250 GB)
Cooling fan is loud.
The Sony DVR works fine, but its fan is noisy -- so noisy that I was considering returning the unit.  However, I found that putting it inside my glass-doored stereo equipment cabinet effectively blocks the noise while letting through the IR beam from the remote control.  It probably runs a little hotter in there than it would in the open, but that's the only way I can live with it.  I'm dissappointed in Sony for not paying attention to the acoustic design of this product.