One of my horses has an Amigo stable rug and its about 4 years old but washes well and looks as new.
He tends to get rug rubs but is fine in this- Im very pleased with it.
I have Rhino turnouts and they are good but I actually prefer the fit of the amigo (horse is TB)
my mare has massive shoulders, some cheap rugs are stupidly small on her but amigos have always been fine! I was worried because they don't have the leg guests but they fit her really well, with no rubbing!! that's turnout rugs, which she will move about in more than your pony will in a stable rug!