I had a cribber/windsucker. It was VERY stressful for both me and my horse. It can't be cured and even though my horse was super fit from daily exercise she never stopped thinking about sucking. She hardly ate at all. I loved that horse and wouldn't have traded her for anything but I would never willingly take on a windsucker.
I have cribber and I found its pretty managable if you keep them in a crib free enviroment. i.e eletric fencing! But,cribing is a awful vice!
I took care of a cribber. Worst habit there is. He would bite/crib right through my medal gates. (ne gate he managed to bite through two rings.