Hello.
Delivery on time. Order not damaged.
Very satisfactory material quality. 
Installation instructions could be clearer and more precise. (That's why 4* instead of 4 1/2*).
Suggestion: It would be nice and thoughtful to have a diagram (architectural) or a template with the locations of the screw holes, in relation to the length of the top blind bar, included with the installation instructions. To make this calculation is easy for the learned, timeconsuming for many and impossible for some of Your customers.   
You are doing such a good job otherwise, keep it up.
Thank You
herman