Yes,its good!
Only downside I think is that you tend to waste some,just because its a powder,and it kind of seems to fall off- or maybe I just put too much on!
Yes it's fab. If your unsure, see if you can sprinkle some on your hands (possibly borrowing some from a shop or friend ) then see what happens when you wet your hands. I tend to put it on my hands and rub it onto legs. That way it reduces waste and gets the powder right near the skin. A word of warning though, my hands are then powdery for ages as you can't get it off!
I found it really stung my mares legs very badly, she would stamp and spin to get away from it although she did have mudfever then and I was using it as a cure rather than a preventative. The best thing I have found is get some cheapy vaseline (petrolium jelly) and some rubber gloves. Its a great preventative and it gets rid of any soreness already there and you dont have to aply it every day if you lather it on and its cheap too
Muddy buddy Kure cream is fab. I tried everything to clear up a new horses mud fever but it got worse and worse, within 3 days off using this it was neally gone, bloody fab stuff and will always keep a pot in stock. It is around the £16 mark but worth it. It's proven to kill the bateria that courses the mud fever and you can put it on top the scrabs and they just seem to drop off during the day
Have used it for years as a preventative - I can't say if it would work for a horse that already has mud fever. I think it works best if applied to dry clean legs so I hose off the mud at night and put the powder on in the morning before turning out. Touch wood we have never had a problem despite seriously muddy fields and other horses on the yard needing box rest and antibiotics due to MF.