I've been using the T5/GH500 (have them both) for several years now and might be able to give some input here. Both blinds have the blackened interior which really helps and I would recommend getting.
The one mechanical I know can be shot through the netting is Rocket's Steelhead. We have set up our blind with the window netting, testing them in camp and using them in the field. We have tested them out to 30 yards and they flew
completely unaffected. I would agree with Muddy and stay away from the mechanicals with the larger prongs that open the blades, I haven't tested them, but would imagine they would catch a little on the netting.
You can place the blind anywhere with turkeys,
though I've found putting it up against some cover or large trees seems to help. You do not have to worry about brushing it in for turkeys.
Whitetails are a different story. From my experience, unless you can leave it set up for a length of time to allow deer to get used to it you better brush it in ....and well! I can't tell you how many deer have stomped and/or blowed around my blind in the spring. I've hunted whitetails and mule deer in Arizona the past 6 years, set up on waterholes, and I've learned from my mistakes in what it takes to brush up the blind. The first couple years I tried to use only "natural" items(limbs, sticks, weeds) and would get busted every time. My friend and I decided to try some 3D netting we purchased at a Army surplus store. In addition to limbs and weeds, we pinned some synthetic oak leaves to the netting. It takes a little extra time to set up, but I promise you it will work. I don't hunt whitetails here from my blind, as I hunt from treestands, but if I did, this would be the system I would use. I just don't think there is any possible way a mature buck or doe would not notice the blind with just a couple sticks and limbs thrown on top, unfortunately it's not that simple.
Here's a couple pics from my waterhole setup this past January. The deer could not approach from behind my blind, there for I didn't add anything to the netting.