Wouldn't consider it to be worth more than $50. (Time someone has to spend applying it to the car)
Most dealers charge $500-700+ for that type of application. They come in a variety of different names, whoever the dealer partners with.
It's an up sell and one where dealers make a lot of $$$ off it.
All those "coatings" are pretty much the same. They don't last forever, just a lot longer than wax.
To be honest, it's not going to do much. It's just a modern form of wax at the end of the day.
In other words, your dealer just gave you a $50 credit, perhaps at true cost $25.
Nothing in the dealer world is free. Keep that in mind...
If you want to get it done, do it.
Or just say no thanks, buy a $20 bottle of sealant and go over the car yourself in about 30 min.
ps. 99% of the time dealers DON'T do the proper paint correction at delivery.
Even brand new, factory paint can have a LOT of problems.
If it was me, I'd say no. Send the car off to a real detailer to clay, polish, etc the exterior then seal it.