I really, really don't like stand and tie stalls. They are too small and unsafe for a horse, not allowing him to move normally, avoid his pee, lie down... There were some in my old boarding place, but fortunately we'll have a new law soon where it will be stated that horses, if kept in stalls, can be only kept in box stalls that are at least 3x4 meters large.
However, since I got to know 24/7 outdoors way of keeping horses, I look upon stalls completely differently... They all harm horses in some ways, though the harm can be minimized in some..
I have come a long way, to surrender my shadow to the shadow of my horse.