This seems to be enjoying a renaissance, so to say. Some of you who are going down that path might not know Fonty, who was very active on this forum some time ago. If you search his posts, you will probably find some helpful and encouraging reading. He's quite experienced with dry fasting, and preferred it to water fasting.
For myself, it's not been attractive in the least -yet- but I understand it can be quite amazing, in its effects. As always, safetyand rest and all that is important.