Just got my 530 a couple of days back and happy to report no issues with the buttons, or anything else for that matter.
It’s a great looking unit, but I did feel that the build quality of the unit isn’t as good as the 520. It just doesn’t feel as robust in the hands, and the buttons feel a bit ‘plasticky’. Time will tell.
Processor speed is a lot more better than my current 520. I haven’t done any navigation yet, but just moving around the menus, you can feel the snappy response.
Getting it set up was a little bit of a learning curve, due to slightly different menu layout, but having done it once it’ll be a breeze from now on. I also dumped some custom maps on the unit without any problems.
When I’m riding, I have only Stages PM, HR and Di2 connected via ANT+. Bluetooth and Wi-Fi disabled.
On my first ride, I ran it in parallel with my 520, just to make sure nothing was out of whack. All the data was pretty well aligned between the 2 units, with only some very minor discrepancies. Could have been caused by me not starting the 2 units at precisely the same moment. After discussing with a buddy, maybe it’s the way the unit collects the data… Different GPS chip?
During the ride one thing I did notice was the screen quality, which is a huge improvement on the 520, both in terms of size and clarity. Usually I would have my 520 back light set to 10% brightness and on all the time, which was fine for all my riding. I set the 530 to auto-brightness and the difference was night and day. Super clear, even in bright midday sun.
Final step is to get my new Assioma pedals set up and get them hooked up to the 530. If all goes well here, I will be retiring the 520.
Anyway, happy days so far.