I have been thinking about getting one of those. Honestly only the battery preconditioning for max performance interests me. Even then I don't see myself using it a bunch. Does it have a way of showing you the battery temp?
I use my S3XY for rear fog activation (it exists but NA does not have the on/off switch), push button mirror anti-dazzle on/off (I have DARK tint, helps with parking), interior cabin lights (I have a 3-year-old, I use the lights a lot), auto switch between driving modes.
I don't use it, but a feature that a lot of people use, who do not have FSDs, auto reactivation of Autopilot. I have FSDs, so I let the car change lanes for me.
Reactivation of autopilot. If you use the indicator before you switch lanes, autopilot will release steering as you switch lanes, then on a preset amount of time after the cancelation of the indicator AP will auto resume.
I also have hold rear driver's side rear door handle open to unlock charging port. If you hold the driver's front door open it will pop the frunk.
In the app, you can see battery temp, you can even throw your phone on the dash and hit a setting and make it a heads-up display.
The app also has blind spot monitoring without the use of the indicator. You just need to get a phone mount.