I have had my 2019 MacBook Pro 5 days. I have the upgraded 2.4 GHz i9, 32GB, Vega 20.
So far, no crashes, Touchpad identical with 2018 versions, keyboard is GREAT, love it! No coil whine, display issues, throttling. Here are my benchmarks:
Cinebench: 3231 with power (all approx. ranges) at 54-55, CPU at 3.1, temp 95-97, utilization 99%. I ran it 4 consecutive times.
Blackmagic: Write 2669, Read 2688
Geekbench 5724/30887
Engine Heaven on the default setup (I didn't change anything) FPS 82.6, Score 2082, Min FPS 50.4, Max FPS 145.5.
It ran a little warm on the bottom for about 2-3 days, now it's cool - I suspect that was the indexing and setup etc.
I set it up from a Time Machine backup from my old MacBook Pro, there was about 1.2TB of data etc. it took around 4 hours.
This is really an awesome laptop. It may not be the top laptop in the industry in performance, but with its display, keyboard (I love the minimal travel I type a ton faster with it after using them for about 3 years), still excellent performance, sleek unibody, fast disk, and a much better OS than Windows, I am sold.