I hunt all year from a groung blind and they work well. I don't have any problems with deer not getting used to the blind. We set up just when we use it and have deer come in and not pay much notice to the blind. If you are in heavy cover you need to conceal it more.You don't want to have it sky lined so set up under a tree to break that up. I have set mine in the open and have had deer come within 20 yards with no concealment at all. The biggest thing is conceal your scent,movement,and sound and play the wind. I never have left mine set up for them to get used to it.