Ohhh, fancy headlight washers. I'm sure your mom, like everyone else, will never use those
I dont think you'll regret this. Of course I am biased driving a LS430, but Lexus does make a great product that seems to last longer and require less maintenance that other manufacturers.
You might also look into getting a Techstream cable and software. Not only is it great for diagnosing issues, but you can also customize a ton of things. If you're ever near Sacramento with the car, let me know and we can hook it up and set everything up the way your mom might like.