It’s that easy. I use the same product and it couldn’t be easier to remove the hard build-up from drive-train. Plastic forks, I found to be quite handy when one deals with too much gunk, and the chipper and thinner the better they can get into the tiny space between the drives. If you want to use a detergent, bottle and bowl brushes can be handy, just about all around the bicycle.
A clean drive-train will give you a more pleasant ride (considerably faster, and easier).