Fab stuff been using it for 3 weeks - TB has put a nice steady amount of weight on and he loves it!! Seems to last well to (still got over half a bag left).
I use Fibre Beet which has alfa in it (based on alfa I think). I swapped to this from speedi beet about 2 months ago, it is 100% better, he has held (and gained) weight considerably since swapping over.
I've just started using it - my horse loves it and he has stopped losing weight. Seems to last for ages too and my horse has not reacted to it or got fizzy at all (and he would if he could!!!)
Yes - requires 2 hour soak in cold water. On the bag it says can be done in 15 minutes using hot water, but in my experience it takes a bit longer otherwise you get some little hard bits left.
If any of your feedstores stock other Dengie products, why not ask if they will order some Alfa Beet in for you. This is what I do with my local store, although I have now found another local one that keeps it in stock.