I've bought this recently and I have no complains whatsoever. I've got the 16G, i7, 4k display, the Linux edition.
The keyboard is different though. Not only does it now have dedicated PgUp/PgDown keys but also hase much better feedback. It's still shallow but it's definitely an improvement over the previous iteration. I am comparing it to the Precsion 5520.
One small problem for me is that the fans turn on and off too late and I am sure that if this can be configured, even more performance can be squeezed from this little beast. Turning off too late is also very strange as there is absolutely no need to further cool down the processor from some point on.
My machine does not experience any coil whine. This was a very important purchase factor as my Precision from work does have this annoying noise and it is driving me crazy, and as my previous XPS from 2014 did have it as well.
What else, the display is gorgeous and I'd place it equally to the Macbook Pro. Compared to the Precision... well the Precision display is in a league of its own.