I like the ones i have used and made. I like to have matching stitch markers and earrings so I and my knitting all match. And I always like to be able to customise things to my preference for size, colour, etc. They do keep their place when put down. I do recommend though that if you use ones where the beads on different strands are the same, that you put a dangle on one end, or mark it in some way so that you can always keep it on the same side, otherwise you could put it down and wonder whether you are on row 66 or 33 (you only need 9 beads per row not 10).
They are always right there, you just push a bead with one hand, you don't have to look at your paper and pick up a pen or fiddle with a clicker or turned holder, just a brief touch of your wrist at the end of each row.