I love my seat rail.

Besides the looks, it's the perfect solid handhold to move the bike around, and a great bungee point for stuff on the solo rack.
On the downside, it makes pulling the shocks for rear end service/tires a bit more difficult. It don't wanna bend at all (to slide the mounts off the frame studs). The rear mount bolt head also chewed up the bottom of my old bigboy seat a little bit, sliding the seat on and off (mine is an older model with thinner stock).
And that is as sharp a Valk as anyone could ever want.