I haven't used it (until now) for that very reason. It smooths the photo over too much and I have not been able to make it work like I want it to. You should have seen what it did to my poor dog!
I used it here because this was the best photo I had of this fish (to date) and it showed his colors pretty well. The original is pretty "grainy" and that is what I was trying to clean up. Unfortunately it rubbed his forehead out in the process.
At least I finally got the camera out again! Baby steps.....
When I finally get the fish room done, I will be able to shut-off and/or remove the sponge filters, clean the glass and with a little patience I should be able to get some better shots.