I have one of their long range Soule type sights on a 40-65 rolling-block rifle, and I bought the sight about 15 years ago.
As Mooncoon says, it does not have "click" adjustments, but the windage and elevation markings are very clear and repeatable, and both adjustments lock up tight.
The one I have has the central elevation adjustment stem and the elevation markings are on both sides of the staff, which is very handy for me as I'm a lefty, plus the eyecup is a "Hadley" type with 6 aperture sizes.
In my opinion it is just as good a quality as the M.V.A #107 sight I have on another 45-70 rifle, and was considerably less money.
I would have no hesitation in buying another if I ran across another good rifle to put under it.
Regards, DaveF.