Yes I have seen these remarks too. I find often the people think the epsom is a salt instead of magnesium and they assume it is bad.Also often people that have Gallstones also might have stones or sand in the kidneys. Your kidneys might have this, Andreas suggests to do a kidney cleanse every few flushes. I personnally never do and also have done the Bowel Cleanse with Epsom Salt for 3 weeks.
I have done the kidney cleanse a couple of times, the same I just did a parasite cleanse, but they have not giving me any indication that I had problems.
I do use a chi-machine every day to keep my lymph system going.
As far as liverflushing we did hear several times that people felt thirsty, but since we now know that it is ok to drink water up till 20 minutes before the 1st Es and again after 20 minutes and may be not drink 2 hours before the OO/GFJ I think that has helped people. I would think, at least I do, but it has not been discussed, I use water in the morning with the distance of 20 minutes from the ES.