I'll tell you what, after you have a rotary that shoots vertically as
well as horizontally you'll wonder how you did without it.
I have a PLS HVR505R. You lose the line in bright sunlight,
and they do offer a higher visibility model for $500 more or
so, but I don't know if it's worth it.
well, yeah, they work well.... you have a rack to run
across a tilt up, make a measurement for one end
and put the receiver on it, put another mark at the other end,
and scooch the laser around gently while it's spinning, till the
receiver starts beeping, and when you get the steady tone,
you are there... accurate within 1/8" or so...
go pick up the receiver, get on the scissor lift, and start
running rack.. the hilti has a receiver that's a remote, so
you can control the laser with it, including limiting the revolving,
so it wiggles back and forth, and doesn't cause an eye hazard all
over the job, and makes the beam way brighter, so you don't need
a receiver as much.