I've been use Double Bull Blinds for several years They are not cheap but extremely well made and very durable I tired the cheaper ones and found that Double Bulls are well worth the extra money. They last forever! They are now made and sold by Primos
Like everything else, you get what you pay for. I hunt close to 90+ days during deer season and I have never had a single issue with these blinds. A couple of them are 6yrs old and still as good as new. Rain, wind, heavy snow, the hold up extremely well.