These blinds serve the purpose I needed them for.  I put them in our backyard shed to cover the windows.  They allow light to come through but you cannot see in from the outside.  They are plastic and lightweight.  I do not like the clips and straps used to roll them up, but since I only needed to do that once, it wasn't too bad.  I preferred the older style rollup blinds with cords, but I notice they all have these clips now.