Zero hand sanding. Zero shoulder damage. Zero shoulder pain!! Takes about 5 minutes per side per grit. I went 80, 120, 220, 400, then 1500 lol. I will go back to 800, then 1200, 1500, and 2000. I think 400 to 1500 is too big a jump, but hey it still came out pretty good.
That's the rub. (hehe see what I did there?) It's hard to get a satin finish with one. But on the other hand you can always get it up to about 1000 to be sure there's nothing left below that and then go back with some 600 and drag it to satin.