Hi,
My mum had her gall bladder removed 4 years ago. it went swimmingly well, except that she was scared of the morphine induced hallucinations and asked to be given paracetamol instead.
The nurse said that the gall bladder is like a storage room for acid produced by the liver. The liver is always producing it and the gall bladder stores it for when you eat. Then it squeezes itself and gives you that extra acid for digestion.
She is fine and fit now and the only thing she has trouble eating is lettuce, otherwise she can eat everything.
The scar is also very little, they do everything keyhole now, so it's less invading.
Good luck.