I recently cut the cable TV cord with the assistance of the Tablo 4-Tuner OTA DVR, so I thought I'd share a few thoughts on it.
Over The Air (OTA) HDTV
First I'll point out that I don't watch a lot of TV, maybe a few hours a week; however, my family does, and likes to keep up with several TV shows. We've always been cable TV subscribers, both with Time Warner back on the East coast, and Comcast out here on the West coast. We've used the DVR hardware and services from each since they began offering the option(s).