While I used a blind for turkey hunting (spring) all the time, I've rarely used one for deer.
I put one up one afternoon and within 45 minutes my son-in-law had his first deer (not a bow kill). The blind was tucked in some cedars and I told him the deer would come out into the field and he'd have to be ready to shoot because it would see the blind, which it did.
I've also see deer come out in corn fields at a buddy's place in Indiana and look right at blinds that were super concealed and had been in place for weeks.
I have an aversion to spiders. I don't like to crawl in blinds during warm weather. Spiders are waiting to drop on my poorly covered cabeza, a.ka. gourd.