The seater dies work well with the sliding sleeve to hold the bullet, but the comp FL sizer in my experience has been a bit more sloppy than the redding and forster sizers. I have 4 sets of the RCBS comps and will go to Redding comps in the future. My redding comps offer bushing ability to specificaly control neck tension during the sizing process and I feel they are machined a bit better on the tolerances.
The micrometer settings do make switching from load to load very quick but I HIGHLY suggest you invest in a comparator as well. This will give you your distance from case-head to ogive and after you have determined the distance from case-head to ogive to be "at-the-lands" then by simply dialing the micrometer and checking with the comparator, you can seat any new bullet to the exact same distance from/to/in the lands as the previous loads. I like being able to write down the settings for each bullet in my data cards, and then if I want to switch bullets from one to the other, I just dial into the settings I recorded for that particular bullet and I am up and running in a few seconds.