I'm not going to speak to this are any specific blind, but there are some general concepts to consider if deer feed calmly around the blind when you are not in it but are on red alert when you are in it.
The first thing that comes to mind is scent control. A blind helps to some degree holding in scent, but the key is to start with good scent control before you hunt. I'm an archery hunter and need to get close to deer without a blind. I wash my hunting clothes in no-stink and keep them in an air-tight container. I shower immediately before I hunt with non-scented soap. I don't even put my hunting clothes on until I park the truck and get out to hunt. Only rubber boots are used.
The next thing I think of is silhouetting. I never open windows in the back of the blind and I open as few windows as little as needed to hunt. I like a blind that is large enough that I can sit in the back corner with no light hitting me. When I see deer from there, I move like I was in an open stand, when the deer is calm, feeding, or distracted and looking elsewhere.
Next is blind setup. I want to set up a blind so that the sun is on the back side with no open windows during the time of day I plan to hunt it. You don't want direct light coming in any of the windows. I also like to brush in my blinds with limbs and such from the field. Turkey don't at all care about how long a blind has been set up or those black windows, but deer do. I don't open windows when I hunt. I open the windows I need and set them exactly where I want them when I setup the blind. This allows deer to acclimate to the open windows when I'm not in the blind.
One more thing that helps is replaceable shoot-through netting on the windows. Sunlight tends to reflect off it and it softens the "black window" effect you see in the picture of the blind above.
Thanks,
Jack