I used them
I have used the folding steps on a friends mast. I work offshore and climb for a living, and I did not feel safe on the mast steps that fold. For one thing, you are too busy working to keep tract of the steps. He had the steps staggered. I know they shouldnt fold up easily, but sometimes they do from the slightest kick. Keep in mind that when i was climbing. the boat was rocking.
On my Catalina 30 I mounted the triangular shaped ones. Your foot is always in the stirrup. I put them high enough up so that the last step had my waiste at the top of the mast. all of my steps were staggered except for the side by side ones just below the spreaders and the last set up near the top. My halyards were outside the mast, not internal. I fouled the halyards on the steps a few times, then I got used to them and didn't tangle them anymore.
Nice N Easy didnt tell you that he can stand on his tip toes and almost reach the top of the mast. Also keep in mind that I can haul him up in a bosuns chair. They need a fork lift to get me up their. Has something to do with body geometry. Actually N&E is right in the fact that one feels more comfortable, safety wise, in a bosuns chair than on the steps when the boat is rocking. There are times that you may just have to get up the mast when the boat is rocking. I had a spreader boot missing and in the middle of the Gulf of Mex, my jenny caught the sharp edge of the spreader and got hung on the stitching of my jenny. Well, since NiceNEasy weighs substantially less than I do, guess who went up in the bosun chair?
I dont want to give you the impression that I am overweight, I'm actually just 'under tall'.
Tony B