Has anyone here used the Scientific Atlanta Explorer Digital Set-Top Box / PVR? Time Warner is offering one locally for an extra $5/month, so I'm going to trade in my current box for one of these. They're supposed to have two tuners, two MPEG encoders, and an 80 GB hard drive. Recording time is 50 hours. Plus, since is uses the same programming guide as my digital cable, there's no need for a phone line.