I can't speak for anyone else but I've been using them for 5-6 months and love them. My tank is doing much better than it was without them. I have no detectable nitrates or phosphates. I love that I can overfeed and not worry about it. All my fish are super fat, most os my corals are happy and again, no nitrates or phosphates. The only coral that is not doing worlds better is my GSP but it grew like a weed in my old tank so it's kinda nice it's growing a little slower. SPS are doing far better.

On another note, the price of biopellets and reactors seem the same as they did when I bought 6 months ago. Where are you seeing that the price has come way down?