As I mentioned earlier in this thread I couldn't be happier with my Series 1 TiVo - its a VCR that I never have to swap tapes with. One note, though - the unit I bought came with the original (v1.3) software. That software is so old that it hangs when the inital setup routine is run, if you select cable as the input. You need to "lie" and select TV antenna as the input. The setup routine will complete, and overight the TiVo will download an update to v3.0 Then you will be able to rerun the setup and select cable as your input. Took a while to track down, my unit kept crashing on setup and I thought it was defective.
This is not a problem if the previous owner had already upgraded past v1.3