I have just completed (yesterday, Tuesday) my 2nd Flagyl pulse, this time for 2 days (first one for one day). Hasn't been particularly bad, generally I felt (and feel) a little unwell and fatigued, but not too bad.
Overall I have experienced some big improvements since starting CAP. I can work all day without needing naps and my movement has improved. I played tennis on Saturday and Sunday. On the Saturday I was feeling great and playing the best tennis in ages and 2 people told me how well I was playing. On Sunday I wasn't feeling so good, my leg felt stiff and my play was not very good. So I feel that my progress is very much upward, with some amazing days scattered around.