I've come to the conclusion that ceramic coating is mostly snake oil. Nearly all the products are sold via a closed detailer network and it's virtually impossible to find any information about what's in the products, how they work, and whether there's any verifiable proof that they work at all.
Based on my own research it seems that most/all of them are polysiloxane-based coatings, which in itself is good news. However, I'm not at all convinced that there is special sauce in particular brands that would distinguish them over the others, or that justify the prices being asked.
I personally think that the main benefit of a "ceramic coat" is the time and effort spent preparing the paintwork beforehand rather than the coating. That's what really adds the shine!
I've been using Klasse for some time now and it's cheap, easy to apply, and works really well. It's an acrylic sealing compound which generally, after a couple of coats, lasts several months before needing reapplying. I'd suggest you give the car a good polish (hand or DA polisher) and apply Klasse before splashing out on fancy ceramic treatments of questionable value.