It is also possible to have gallstones develop in the bile duct, even though you no longer have your gallbladder. Possibly a cause for the pain under your rib area. Also, the the use of laproscopic surgery when removing gallbladders, side effects/complications can arise that otherwise might not have. Alot depends on the expertise of the surgeon in laproscopic surgery, how well he/she manipulates the equipment in the somewhat small area, and if any surrounding tissue/organ was damaged during surgery.
I'm a questran user and have been highly satisfied with it for many years...but as another poster mentioned, mixing it with water is a pain..especially if you forget to rinse the glass out well after drinking it. Let the residue dry, and no dishwasher is going to remove it well..you'll have to handwash it!! LOL