The current, modern ROMAN CATHOLIC Rosary.... http://www.dummies.com/religion/christianity/catholicism/how-to-pray-the-rosary/
I don't have HUGE problems here.... Probably most the "Mary pray for us now and at the moment of our death" - not because I'm against prayer or even Mary praying but that it MIGHT seem to give Mary a role in justification that She doesn't have. As a Protestant, I just feel that Mary is getting too much attention here, but while I (like all Lutherans) would word a little bit of this differently, I don't really regard any of it as heretical.
A rosary is just a tool..... nothing holy or special about it as a thing..... it is just a way to organize our personal devotion time, a time that overwhelmingly is focused on Bible reading and the Lord's Prayer and Ecumenical Creed. I fail to see why any Protestant is could be opposed to personal devotions, Bible reading, the Lord's Prayer or the Creed. Or some tool to help with that (such as using a devotional guide or some schedule for Bible reading).
While the current, modern ROMAN CATHOLIC Rosary does get a lot of encouragement, it is optional. And lots of Catholics never use it. In my Catholic days, I very rarely did. A couple in my family do but the great majority don't.
IMO, this is ONE (of several) things some Protestants get all in a fuss about that..... well..... doesn't deserve it (although again, there IS cause for pause with the Hail Mary part of it which easily could be left out or changed). Complaints about how Catholics number the Commandments, how they refer to some clergy as "Father" - these are others in that group of things.
But of course, the discussion here is not about the modern, current ROMAN CATHOLIC Rosary but the several forms of Protestant ones.