Opti coat is amongst the easiest products... so yes its an exception. Usually such products gain quick acceptance as many rookies buy and apply these with ease, moreover car dealerships love offering such coatings to make a few more bucks while selling a car. Does not neccessarily mean they are what they claim to be.
There are precautions, such as any proper coating will be having SiO2 in it and that will make crystals on ur applicator and bottle's dispenser... if you are a rookie.. u can really put very bad scratches on ur car while applying it.
Real long life coatings usually arnt easy to apply. And they are not forgiving if you dont follow instructions 100%. 
And i suppose you already know all what iv just said.
Bdw @Ausl you are an enthusiast or a prof detailer?