I have used the decal system, but i hated doing it as i never seemed to get the decal exactly where i wanted it, if you look at the top right image of the home page there is a pen with a Yorkshire Rose on it using the decals .. But to get one good one it took me about 4 or 5 attempts, hence why i gave up .. 
Now, if you can get it right, it really is a good way of doing exactly what you want .. Give it a try, they do look good when you get it right .. Welcome to the forums BTW .. 