I got a 928 a few weeks ago and had switched to it as my main device from my Blackberry Q10. I really liked it with 8.1, though the biggest issue I had in daily use was the keyboard. Then I realised I had to push gently on the back of the phone so I could hear someone on a phone call (bad connection somewhere internally I assume?) and then the phone wouldn't come out of headphone mode. A day later WP10 TP was released so I switched back to the Q10 as my main device and the 928 is now a mini tablet. My installation was a little bumpy; took a while to finally connect to the servers, then I had to reinstall 2 or 3 times to get it to load properly, but now it's running (reasonably) fine. Keep in mind I've only been using this as a music player/camera. I was going to use the offline maps/navigation for a road trip, but as mentioned earlier, Maps/Here Drive+ are broken.
Issues:
- Music doesn't show album artwork
- Random freezes (usually in the app switcher)
- Outlook Calendar has replaced 'Calendar.' Not really a bad thing, just the tile on the home screen is a different blue and doesn't really fit aesthetically
- Can't adjust image position for lock screen
- Camera seems to be a bit slower to load
The Good:
- Expandable drawer for additional toggles (airplane mode, rotation lock, etc)
- Smaller text and UI for settings makes navigating it so much easier/nicer (though there is dead space at the top of the list)
- Project Spartan is a lot nicer than IE
- Overall pretty smooth experience for an early build on an older device