I tried digestive enzymes about a year ago and it was one of the three that you mentioned but I don't remember which one. I took them for about 3 weeks and stopped because they were causing so much cramping and pain that one day I stayed home thinking I had the flu. I was hanging over the bowl and vomiting with nothing coming out. I finally figured out it was the digestive enzymes and stopped them immediately. All my cramping stopped shortly after that. I am afraid to try anything else and have been turned off by them ever since.
I hope you have better luck finding the one that suits you just right. Maybe mine was just the wrong type.