Who has tried them? What made you decide to try them and what benefits have you seen?

I tried them a couple years ago. I was not impressed. Our horses didn't lose weight, but their coats surely didn't look the same.  Also, their poops weren't the same consistency.  I'm good friends with our state vet and one day I asked his opinion.  He said he would never recommend sprouts as the main source of forage and our horses likely are missing nutrients.  We switched to alfalfa pellets and they did much better on that. 
i perfer cubes vs pellets, but we had one horse (which we've since sold) choke on cubes.