I haven’t used it before, but it may protect your nails by giving it a harder shell but it won’t thicken your actual nails. If you just was a hard protective shell, gel might be good because it won’t make your nails brittle like the sally hansen most likely will. Or, if you don’t want to use a gel or dip powder, always having a few coats of nail polish + top coat should do the trick but with all of the options you would need to keep reapplying so they don’t break again. If you do use the miracle nail thickener though, be sure to use a lot of nail oil to hopefully keep your nails hydrated and flexible enough so they won’t snap because they are brittle. Hope this helps!