Having recently purchased my own adjustable standing desk, I am here to tell that these things are all they are cracked up to be.
Mine can go from a sitting height to a standing height in seconds, and works perfectly with my docking station ( see this website for more) and dual monitor setup. As I use both a MacBook laptop and Windows desktop, this is important too.
I find it best to use both settings alternately as I get uncomfortable standing too long, and too comfortable sitting too long.
Some setups are comparatively inexpensive, especially the ones that convert a regular desk to an adjustable one; but the extra cost of the type of desk that has the whole thing raise and lower is well worth it.