Back in the day when I was converting S-gauge steam and diesel engines to ERR TMCC control and sound (when those S gauge boards were plentiful), I converted my ATSF SHS A & B unit. Both had sound (no tethers, grew tired of those), but I programmed the B-unit to not sound its horn or bell. The A unit had multi-color marker lights, etc. As a powered pair they ran so strong and smoothly. No matter what, ScaleTrains' S-Helper stuff should all have a great foundation to work with. Don and Robin made sure of that.
Here's a video of them in action (low res, 13 years ago). https://youtu.be/eqDEyiXtA2g