Has anyone installed either of these brake controllers?

Curt Spectrum Integrated Proportional Trailer Brake Controller (https://www.curtmfg.com/part/51170)

REDARC Towing Brake Controllers (https://www.redarcelectronics.com/us/trailer-brakes)

If so...
1) where did you put the ****? (photos would be great)

2) where did you mount the controller box?

3) any installation tips?

4) what have been your impression and experience with the device?

TIA