I'll fess up. I field stripped my wife's Mark III for the first time, literally today. It's not that hard, but it's just lots of little fiddly things that have to be just so or it turns into work.
Being "new" (and yes there was a procedure for "new" ones), the driving the bolt stop out with a plastic pin, using a zip tie to get the mainspring blade release out, and (my personal favorite) having to whack the back of the barrel with a plastic mallet to separate it from the frame (and the frame to seat it back in place on reassembly) were a bit disconcerting (all procedures, btw mentioned in the Ruger manual, so yes, I did read it). The only issue I really had was geting the hammer positioned right, making reattaching the mainspring a bit of a challenge. The "put a magazine in for one task but take it out for another" or "hold the trigger now but not NOW" got a bit old too.
Of course, my mood was darkened a bit while driving out the bolt stop I mis-hit the mallet (one with a screw-in nylon insert), slipped off the dowel and dinged the back of the barrel just above where the bolt is. That one's on me.
I also changed the sights to the Hi-Viz for her, which is another fiddly little task that took a bit more time too (did not enjoy at all the installation of the rear blade). This also probably darkened my mood a bit. Still, it has nice hi-viz sights now, so the missus is happy, which usually leads to brightening the mood some.
By comparison, I also field stripped, cleaned and reassembled my LC9, my XD45 and Neos today too (first time on all but the Neos). All three of these combined took less time than the same tasks on the Mark III.