My mom tried these several years ago, but it was the western version... (It sounds like you talking about an english version?) You replace your stirrup with the EZ stirrup (obviously lol!) and when you want to mount, you slide the EZ stirrup down. I think it goes down about 3" but don't quote me on that. That's pretty significant in lowering it enough to put your foot in the stirrup. That made it easy to mount, but I thought it made it a little awkward because then you weren't quite high enough to swing your leg over very gracefully... It's like your crotch was a little too low so instead of swinging over and sitting, you have to swing over and scoot up. But that may have been something to do with the saddle, as it was my moms and its possible her stirrups were longer than I needed or something when I was just trying it out - I honestly don't remember. After you are mounted in the saddle, you can pull the stirrup back up into its original position with your toe.
every ride counts.