Hypertech or Rough Country Speedometer Calibrator which is better?

Needing some feedback before I pull the trigger on buying a speedometer calibrator. I have looked a both but am wanting to hear some opinions. Thanks in advance

 

I was debating it till a couple people had issues with them going bad.

 

hypertech, 2 years no issues, easy to install and use (if you own a computer)

 

2020 Toyota Tundra SR5 4x4 with Toyota Safety Sense

I just installed Rough Country/Hypertech speedometer calibrator this morning after updating the firmware and inputting my parameters. Factory size 275.65.18 and new 295.70.18 (34.2"). Speedometer now reads 1-2 miles over gps and radar, which is okay by me. But if I entered the actual diameter of the tire when I measured it, it would have been dead on.

But, there's always a but. On my way home, I set the cruise control to 75, and speedo and gps reads 79mph. Whoa!!! slow down, set the cruise to 72 and that locked it to 75.

I called Rough Country tech support and they said that it does not show in their system or Hypertech's website if it's compatible. They are offering my a complete refund it I return it.
I called Hypertech to see if they are going to do an update, and they said they have to look at the sales if there is a demand for it before they can do anything else, but eventually, they will get into it. When I mentioned about the dynamic cruise control, they said, they still have not figured that out.

Hypertech/RC works, but set your cruise control and adjust base on the speedometer, not the cruise control speed.