Most of my rifles are scoped, but two of my 45-70s, one 30-06, and a .35 Whelen wear peep sites. These I use for close range, under 150 yards. My eyes gave out for regular open sites over 20 years ago.
I have a few simmons scopes, they were on guns that I bought at gun shows. None of the ones I have provide the clarity I want. I generally use Bushnell Elites. I have had no problems with them. I have had three Bushnell banners. All three worked for a while, but eventually had problems. Either the crosshairs broke or the thing fogged while new. Bushnell replaced them with an upgrade, no charge. I still have them, so far so good.