I have 3 Ameristep Dog House blinds. There not perfect but they do the rick. I can sit inside mine and see light around the stitching as well. Surprisingly because of the steep slope of the roof it rarely leaks much even in a good rain so I have never sealed the seams. The zippers are the big issue as they freeze and are noisy. I have shot through the material of the blind by mistake, as I thought the end of the barrel was out and it wasn't. Not a big deal, now we have a 44cal hole and some powder burns below the one window zipper. Never where hearing protection as I never thought the sound of the shot was amplified by the blind. Except for the one time the end of the barrel is always 6 -8" out the zippered window anyways. Which I imagine greatly cuts down the sound effects.
They are definitely not bear proof as all 3 of mine got flattened this fall by two playfull cubs. They hit all three in one night one blind twice. Got the little beggars on camera. Had to bring them in for extensive repairs. Bought some camo canvas from a boat top place and contact cemented the material over the rips. repaired the one broken pole with wooden dowel. All three are back out in the bush as we speak. Seems Momma bear and the cubs have gone to bed for the winter, no more midnight raiding issues.
Ever since my friend fell out of a tree stand, a chain broke, and was paralyzed, I have hunted out of ground blinds, then the worst that can happen is I fall asleep and fall out of my chair.