I have caught alot of walleyes on the shadow raps.. original and shad models.. I cast them in shallow. Pause and twitch.. cadence depends on time or year or conditions. Good lure for walleyes… PIKE love them too 
Trolling…. there are better baits for trolling. The shadow rap is ment to be cast, and balanced to be paused neutral or slow rise. The action when these are worked like a jerk bait is awesome… but the trolling (swimming) action isnt anything special. There are better choices for trolling.
Its really a finesse bait, so it comes with light hooks so maximum action and as little weight for keeping things neutral, personally when Im trolling I like heavier hooks.
Will it catch fish.. sure.. but I think there are better lure to be trolling around shallow.