I don't really want to bash a factory sharpening too much but what you get is what you get. You could receive a sharp well tuned edge or a dull obtuse and poor cutting hunk of steel. It's anyone's guess as to what you will receive.
As Mark recommended and I will too, you should invest time into learning to take care of the tools you own, they will last longer and perform better and you will always have a sharp knife. If for now you would like them sharpened professionally I would recommend someone besides the factory. Myself and others sharpen for Mark and produce more of a custom edge for the blades sharpened, we go way beyond what most factory edges are and with performance to match.
What ever way you decide to go just remember at some point it will be easier to take care of it yourself. Knives go dull every day, sharpening them once or twice a year is more like a waste of quality cutlery. Just sayin