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I find using a laser collimator easier and more precise than a Cheshire. Eyeballing the various elements in the sight tube is difficult and mostly guesswork for me, and my eyes can't get them in focus at the same time. I only use the Cheshire for positioning the secondary and rough initial alignment, after I've taken out the secondary for example. The laser collimator (Glatter + tuBlug in my case) does most of the work, and a star test finishes it off.
The laser collimator needs to be accurately collimated itself, of course, but nothing is easier than checking (and if necessary fixing) that.
A big source of secondary mirror alignment error with laser collimators is non-parallel seat inside the focuser. Howie Glatter makes a nifty gadget called the Parallizer. It replaces your standard 2"-1.25" adapter and makes sure the laser beam is parallel to the focuser axis. This is easily one of the best accessories I've bought in a while, and I use it all the time not just for collimation but with my eyepieces too.
Cheers
Steffen.
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