I think some of the suggestions must have been implemented by the time I took the survey. I found it quite helpful so see that many others answered as I did on certain questions which gave me some reassurance.
One point on the wording. I have had some negative side effects as the result of the flush which were only temporary. For example I routinely have allergy attacks and bad skin immedimately following the flush but they go away in a day or two and the condition as a whole improves.
I was also a bit thrown by the size and volume of stones. I don't collect them but I do look and approximate the size, volume, etc.
All in all I applaud your initiative (and time spent which I'm sure must be substantial). I think a survey can be quite valuable especially to those who want to know what to expect, as long as we realize that it is not scientific evidence and that is has a high degree of human error.