Stylists have used dominican relaxers in my hair before. They straighten hair just as well as any other relaxer. I think that they are strong. I don't think that they are as good as American relaxers IMO. When I lived in Sto Domingo, I noticed that they sold a lot of American relaxers in the stores and those seemed to be the preferred type of relaxers down there. They liked motions, etc. Hope this helps.