Used the system before
I have used that system twice before. In my previous house, and in my travel trailer. In both instances, everyone who has seen it says that it looks very clean and a nice way to hide the wires.
In fact, in the trailer, it actually looks like it was installed by the factory for the surround sound. I think you will be very happy with doing it that way as you can stick them to the baseboard so no one will notice. Plus, where it is fairly inexpensive, you don't mind leaving it behind for the next person.
I will try and get pics soon to show you.