Looks like around here you either love 'em . . . or hate 'em.
I love 'em.
I do not rely on them for final set up, but to get the cross hairs close for that first time you punch paper, there is nothing better. I've done the 25 yds, then 50, then 100 and beyond with live rounds and yes, that works.
But with a laser sighter, I can sit in my kitchen and sight in all my guns (long and short) out my back door and know I'd be ready to go to the range.
I've been using a Laserlyte for years and would be lost without one. I don't think they make this one any more, but Cabelas has one just like it for about $40.00.
http://www.cabelas.com/cabelas/en/templates/product/standard-item.jsp?_DARGS=/cabelas/en/common/catalog/item-link.jsp_A&_DAV=MainCatcat602006-cat601622-cat200006_TGP&id=0012854713004a&navCount=2 &podId=0012854&parentId=cat200006&mast erpathid=&navAction=push&catalogCode=UJ&am p;rid=&parentType=index&indexId=cat200006& amp;hasJS=true

This link goes to the model that comes with a level, and shotgun adapters for about $65.00. These types of bore sighters work from .22 to .50 and shotgun.