According to this survey just over half of us have one. I don't, and likely won't get one. There is not that much on TV I care to watch, so why bother? If you do have one, do you use in a lot?
http://news.msn.com/science-technology/dvrs-now-in-half-of-us-pay-tv-homes
http://news.msn.com/science-technology/dvrs-now-in-half-of-us-pay-tv-homes