I use it with Roon, works fine.
Sounds great with higher res stuff, both native and upsampled. I also listen to both native MQA via Tidal (sounds good, a few albums are fantastic, probably due to a new master), and upsampled Tidal streams via Roon-HQP (to 32/352 or DSD256). No Sabre glare that I can appreciate, though I think that is less a deal than a lot of people make it out to be...
I'm not sure if the balanced output is different... I got the adapter, but the cable is also different. My current headphones (Edition X and Utopia) are both really easy to drive, so don't need the added power of balanced. I preferred the balanced output, but it wasn't night and day, and the ergonomics of my balanced cable are better, so that may of played a part...
No lockups, not very warm at all (mine is also well ventilated). There are subtle differences in volume control. I have a Violectric 281 now also (so use bypass mode), but used the built in HP amp for a couple months. I preferred the analog control, though I am sure I'm biased from knowing the signal path differences...
I tried a lot of DACs before getting the Brooklyn and am very happy (though I have been considering 'upgrading' to something that does dsd512...).