I have 5 RTVs (that is changing) & have spent at least 50 hours between reading the forums & "tech support" (on my dime). I've made my living in the computer biz for 10 years & am not a dummy...but have yet to get IVS functional...therefore, it's a nonexistant feature as far as I'm concerned. I was told by Support that was why they discontinued it on the 5500s...and when it does work, it's not very well. There have been other issues that couldn't be fixed, too. I bought a TiVo for my daughter...plugged it in & in 10 minutes was up & running & not a glitch since. No brainer for me.
The corker was when I called RTV on Tuesday to cancel an account & remove the 4532 unit . On Wednesday @ 9:00 PM, the activation screen came up (an hour after tech support had closed for Thanksgiving). Seems they had NOT removed the unit or closed the account, but DID deactivate the Lifetime. Called them this AM (Friday) & he suggested that the guy misunderstood me & thought I wanted Lifetime removed...yeah, right...& just keep the $300. Remains to be seen if it ever comes back to life.
In summary...RTV is like messing with a 286 running DOS & dealing with MS support (with only 40 hours a week availability) & TiVo running Fedora (in fact we have Linux under the hood there).
I don't know how support is at TiVo, since I haven't needed to use it, but I don't see how RTV will stay in business with the sorry state of affairs there.