I bought my unit back in July of 2004, and added another hard drive a few months after. I did a Clear and Delete the other night, and when it all came back up, I thought I had a new unit! I was amazed that it took about 5 seconds to simply record something. This took 3-5 minutes before, and a season pass 10-12 minutes! I hesitated doing the C&D, but I am glad I did!