This technique works well as long as you have enough weight and a very fast hook set. I have used this technique as well as others and it works great. The reason this can be so effective is that the bait can be presented at a dead slow pace. It would be a great way to have a dead slow presentation when trout are passive. The key to making this presentation effective is touch, you need a very sensitive rod and no slack line at all. Another advantage to this presentation is that you can use a variety of baits which include roe, worms, flies, slugs, minnows ect....If you are fishing in a slower deep pool you can use a vertical presentaion which sometimes can be deadly!