I did my own last time & I'll be doing it again. Actually thinking of doing it for other people too.
I don't steam mine, I think it reduces the benefits from it, personally. I just rinse mine (& since I'm encapsulating, I'm not super picky about making sure the water is clear), use a pair of kitchen shears to cut it into small chunks, put it in the food dehydrator overnight & then grind it into power & put it in the capsules.
It's a bit gross cutting it up and it smells kind of funny while dehydrating, but it's not that bad. I get grossed out pretty easily & it wasn't that bad. And I got to check out the true knot in ds3's cord.
I kept what was left, since it's really impossible to get it all off the membranes, & froze it. One day we'll plant it & ds2's placenta (couldn't use his for encapsulation since it fell in the toilet...ick!)
As I said above, the benefits to me were an increased milk supply, less bleeding & far less PPD. It made such a difference that dh could tell when I'd taken some within a couple hours.
Most people who plant theirs plant a tree over it.