The beauty of the Incra TS-LS, is that once it's set, it's pretty much set. I needed some strips 1/4" wide on Sunday. Walked out to the shop, moved the positioner to the 1/4" mark, plugged in the saw and flipped the switch. Five strips measuring 0.250 in under 5 minutes from the time i walked out of my kitchen. If i wanted to do it again tonight--same result. The wood won't stay true, but it can start that way.
When i change blades, i slide the positioner to kiss the blade, reset the magnetic tape (if needed), and go to it. I don't use Jerry's method of making 10 cuts, so i might be off by maybe 3 to 5 thousandths (shoot, i may not be off that much)--but that's without using any measuring devices to do the set-up. Slick system, mounts to the vast majority of saws with no modification, plenty of t-track mounting possibilities, and easy to work with. I looked at several different aftermarket TS fences--quite happy with my decision.