Thermal curtains?

[Tea-rific]

I am considering getting some for our large picture window in the living room. I have browsed plow and hearth, country curtains, and target. I have found some that I like but they are all $$$. I am okay with spending the money if they are really going to help with heat loss.

 Does anyone have experience with these? 

[illgetthere]

They help if you have a single pane window or one that doesn't insulate. They don't help as much if you have energy efficient windows or an actual draft.

[Deleted]

We have insulated double pane windows and I think they help considerably. We extend the rods about 12 inches out from the edge of the glass. I believe we purchased them at Target. Our house is tiny so we're always sitting beside a window and there's a noticeable difference with and without them, especially in the height of winter.