Yes, I did feel good after a flush, whether it was a sucessful one or not. I always had stones came out, it is just a matter of more or less, big or small (some small debris might have been dissolved/decomposted in the way out).
The major improvement is my eye sight after a flush. Immediately I felt my vision improved, I am not talking about focus or sharpness, it is about the sense of realism, clearness, and good contrast that I am seeing for my sourroundings. I don't have to squint my eyes in sunlight, my upper eyelids don't feel heavy, and I can see better during the night. That kinda agrees with the TCM that the liver is the "mother" for the eyes.