I have applied ppf to two C6 Corvettes and currently a Camaro. Full front end, bonnet, front wings, mirrors, windscreen pillars and front of rear wheel arches. Can't recommend it highly enough as apart from the obvious protection, it saves a lot of stress when people pull out in front on motorways etc, as I know I am immune from those tiny, annoying chips. It's not cheap but well worth it for peace of mind. I have used the company in Peterborough, which Steve mentioned above, twice and latterly a company in Waterlooville, Hants.
However, a word of warning - only use a company with access to the templates. They will cut them to size before fitting. DO NOT use a Company who lays a large piece of vinyl on your car and then attacks it with a variety of blades. Insist on no knives, and you'll be fine.
Occasionally you may see a tiny lift and a small amount of grime may appear on the edge of the film. I have a couple of "blemishes" on my car. I know where they are but I bet you couldn't see them. I guess it's the only downside of having it done.
Finally, I have black bonnet stripes on the Camaro and the film has been applied on top of them. There is a chance that the stripes may lift if the ppf is removed. Not a major problem for me with simple black stripes. Your decals my limit you as to what you want to do. I would go for it and be prepared to apply new bonnet decals if needed.