Very pretty!

Around here, that plant is almost always used as a stand-alone (or, in most cases, a focal) plant. Except when it's in flower, I don't think they are all that attractive (they are somewhat coarse). Using them in a hedge like that seems to soften the look a little. So, even when they are not in flower, they probably look a little better, and, when they are in flower, the hedge would give you a massive explosion of color. A huge step up from a forsythia hedge.

For around here, the hedge next to a house or sidewalk, might also work better for hardiness reasons.