I’ve got the 530 and am a fan, but I’m very anti touchscreen. I had a previous touchscreen model and even a drop of sweat hitting it during a ride would change the screen on me, combine that with sweat on my hands/fingers and I couldn’t get it to do anything during a ride. It was beyond frustrating and I returned the device. To be fair though we’re probably talking 2-3 product generations ago so I’m sure they have improved. That said I’m sticking with buttons.
I find the 530 easy to use, but I’ve had the 500, 510, and 520 previously and have had several years and thousands of miles to learn how to navigate the Garmin system while riding. If you’ve used one of those previous models the 530 menus are very similar. Once you know where things are it’s pretty easy.