Cant comment as havent tried this one (i've tired a few mind!) The one im currently using which has really made a difference to by feedmark, steady up advance, seen a real difference in him within about 5days!!
I've used it and was very impressed with the results. Couldn't recommend it enough! My gelding was a chilled out dude on it - I stopped feeding it to test it and soon enough he was back to stressing and spooking.
Fantastic stuff, I really rate global herbs and have had good results with everything i've tried. My boy is on the TB calmer and I wouldn't be without it.
I had brilliant results on a very nervous horse, he had been seriously abused and vieved all humans as threats, once he had been on it for a couple of days the change was amazing. He was still nervous but I was at least able to groom him, clip him, have him shod, all of which had been virually impossible before. At one point a friend suggested that I tried him with a magnesium calmer instead and I changed to Magic calmer, I then could not get near him for 4 days, he was out 24/7 in a lightish rug in late November. In the end I fed him a feed with the a supercalm instant sachet in it, left him for 2 hours and then walked straight up to him and caught him! He was back on supercalm straight away and went back to his trusting self.