I'm sure the above will do a very good job, but costs here seem very excessive, their hourly rate must be huge. A lot of these ceramic coating places are targeting the wealthy and getting away with charging what they like, so shop around and look at feedback. You don't necessarily want the cheapest, but don't get ripped off. This isn't magic, it's just polishing followed by a product application that takes a similar amount of work to apply as a coat of wax or two. If most people knew the actual low cost of materials used they'd be shocked!
As for dealers, don't let them anywhere near your car for ceramic coating, or pretty much any form of valeting work, they almost certainly won't be employing any well paid specialists that know what they're doing. It really is a quick profit addition for minimal outlay to a dealer.