It's a older DVR with a hard drive in it, 160 gig. It also has a full OTA and cable digital tuner. I test drove about 3 of them when they were first released at Walmart. I never got the tuner working properly on cable of any of the ones I tested but I believe the OTA part worked fine and many folks never had issues with them depending on what they were using them with and when they bough em.
If you want to do some searching there should be a older thread about them at http://www.avsforum.com/. My comments and many other users will be in it.