i used it with good results on my mare who has ringbone, after swapping from synequin - much cheaper than synequin as well.
we also used it with great results on our old pony who had mobility problems. it helped her a lot and suppled her.
I have used it for the last 5 years on my old mare, who has spavin and is generally getting a bit arthritic. She is still onwardgoing and pretty sound. This last week, I ran out and had to give her a powder suppliment (pure glucasomine/MSM). The difference was apparent in 5 days, her joints became very clicky and she was noticably sore, wouldn't back up and. She is now back on the Mobifor, horses don't know about what they are getting so there can be no placebo effect. It works.