We planted some in half of the planter boxes in our bean plots last year. They got a bit of a slow start due to drought conditions, but definitely grew taller and stayed green much longer than the conventional RR soybeans. Early on you couldn't see much difference, but by the time they matured you could easily pick out which rows were which. I can't say that deer in the plots showed much preference for one over the other though. And considering we get our conventional RR seed for free, and 2 bags of the forage beans were in the neighborhood of $300, I don't think we'll be doing it again.
I can't recall the name of the place, but we bought ours from an ag services store in Brookings SD. They would've shipped, but we had a family member passing through there on business about the time we ordered them so saved ourselves a few bucks in shipping costs. Good luck :way:
NWBuck