The SWF is generally over in 1 1/2 to 2 hrs. After that you resume regular movements in most instances. Some folks do go through more than normal eliminations but that is more the exception not the rule. When I say eliminations I mean #2 you can count on going #1 more than normal.
The first 3 days are usually the hardest so it's a good idea to start like on a friday over the weekend. You can get by with grade A. The syrup is for nutritional support so you can function in your normal everyday activities. The darker B has more minerals so if you plan to be going to work during the cleanse you would be better of with making the drive for the B grade.