I've noticed good polyp extension and water clarity. I haven't observed any haze in my water, but I haven't noticed much of a slimy buildup on the pellets either. I'm keeping the flow through the pellets extremely slow. Since adding the pellets I've been dosing Brightwell MB7 again, with an initial 5ml dose followed by daily doses of 5 drops each. Eventually, I don't think dosing bacteria will be necessary as it should propagate itself throughout the mass of pellets.
Also, I've noticed very little growth on the glass since I started pellets. My algal barometers are threefold: small amounts of film on the glass, hair algae within the tank (not much but it's there), and the chaeto and caulerpa in my fuge. Chaeto is still growing, GHA is stable, and the film algae hasn't appeared much on my glass.
richierich2000 - as far as I know, you will eventually add more biopellets as the ones you have break down and become smaller.