Yes it is like a strop, but better because it has very little if any give to it, so you run less of a risk of convexing the edge. If your goal is mirror polish you should start with 9 micron and work your way up to 0.1. Diamond plates can leave really deep scratches, so make sure all the scratches from the previous grit are gone before you move onto finer. I'll typically spend a bit more time on the final stone to make sure there's no scratches left before I move onto the films. You might otherwise end up with a mirror edge but still have visible scratches here and there. I also recommend wiping the edge with isopropyl after finishing one film and moving onto another to avoid grit contamination. This of course if you want to be really thorough about it, to me that's just aesthetics, and it's not worth going through that much trouble for a blade you're gonna be running through cardboard later lol. Nearly all my knives get the 600 grit stone and 9 micron lapping then 6 micron on a regular strop and I'm good to go. Then I just maintain freehand, KME I mostly use to reprofile, I like a thinner but more aggressive or "toothy" edge on my knives, easier to maintain and bring back with a strop.