They're a nice tree, but don't believe the hype about 5' of growth per year. Mine have grown far slower, maybe the soil isn't ideal for the tree. They are supposed to be more deer resistant than other thujas, but mine aren't in a place where deer would bother them so I can't verify that. They can get big depending on site, upwards of 60' tall and 20' wide. If you want native trees only, they won't work ... they're a hybrid from Denmark. Unless you buy large trees they won't take on that conical shape for a few years, and because they are taller and narrower more trees have to be planted for a screen than some other selections. Anyways they are nice trees, pest & disease resistant, look good, etc.
One of the fastest conifer screens you can get is Leland Cypress, but they sometimes have bagworm problems and they aren't native either.
