If a problem arises write down the name of the supervisor, time and date. If installer is late past the 8-12 time you were promised, call and DTV installation dept. will verify and you may qualify for a credit on your DTV bill. If you have difficulty with not getting help, hang up and call back as you will get a different person. Explain you just called and need someone to help you explain or understand better. If installer takes money, always write it down on what they wish for you to sign saying service is completed. Write down how much and what the service they requested money for before you sign. As far as getting a new system upgrade, you may be eligle to get a new upgrade for $99 if you speak with a supervisor and if you have been a long time DTV customer. With so many verfied problems with refurbished, I would think a supervisor in technical could work with you on getting a new upgrade and get their newest DVR.
If the problems are with the R15-100, see what DTV will charge for an upgrade to their newest DVR as there have been many documented R15-100 problems. Just like an old car, sometimes it is better to upgrade to avoid same model problems.