Dr. Nodes?

Hey I was looking through my NGW catalog and I found this stuff called Dr. Nodes. Apparently, when you feed the plant it will grow normally, but when you stop feeding your plant Dr. Nodes it will completely stop growing vertically and focus on bushing out. Has anyone tried this stuff out? Does it work well?

Dr. Nodes

That stuff sounds cool, but topping works for me, and it's free.

Indeed. But I wanted to know if anyone has tried it and had good results.