I support that 100%
Follow the directions on the can carefully too, you normally feed the stuff in either through a vacuum port or the throttle body and you spray enough in (depends on product) to soak the inlet valves.
You may need to manually open the manifold flaps (though I think they are sprung in the open position and engine vacuum is actually used to close them) to be sure to spray the cleaner onto the valves.
Then let it soak for the prescribed period.
Wurth is a reputable brand, but I wonder about using two cans on that engine too!