I have not but I can highly recommend the BPN root magic. I am currently using it and I have noticed that my plants are getting root bound extremely fast. I have 4 plants that were started in 5gal pots and are currently in 15gal pots. The plants were root bound into the 5 gal pot in about 1month. Right now with them in the 15 gal pots I am seeing roots coming out of the top of the soil and at the bottom drainage holes.
BPN root magic makes your roots grow like crazy. All's I did was sprinkle some around the root ball during each transplant and I am getting amazing results. I can highly recommend it.