I love it SO much. I wouldn't be able to be a software engineer without it. The amount of neck, shoulder, elbow, forearm, wrist and hand pain I once had is now gone completely. Not to mention I am a much faster and more accurate typist.
I've definitely been on a bit of a kick lately trying to make my work setup as healthy as possible.
I think out of all of those, having the monitor at the right height, vertical mouse, kinesis advantage and then using a pomodoro timer are the best bang for buck. The standing desk is nice but not really essential in my opinion. Just getting up and walking after a 25-30m pomodoro session is good enough.