These curtains are really pretty and amazingly soft. If it weren't strange, I'd pet them just to feel how soft they are. However, they failed to meet my expectations of a room darkening curtain. I suppose I expected something more like a blackout curtain, which these certainly are not. They are sheer enough I can see the pattern of the lace curtains behind them when the sun is shining directly through the windows. 
These are also marketed as thermal curtains, but I'm not sure what gives them any thermal properties. I suppose I'll have to wait until cooler weather to find out if they work. We have 80+ year old single pane windows and thermal curtains are a must in the winter. Hopefully these don't fail me. The windows are 6'x6' and don't look naked with only two panels. I could use another two, but my budget doesn't allow for full window treatments.
All in all, these curtains are lovely and even though they don't quite fulfill my needs they are very attractive so I'll keep them up.