I am heavily, heavily invested in the DeWalt XR range. I started buying them about 6 years ago and haven't stopped since. I'm an electronics and IT engineer, but also do maintenance and restoration work on my own properties and vehicles. I have so much of their 18/20V XR range at this point that it would be quicker to tell you which tools I don't have. I have also started to invest in the FlexVolt tools and batteries over the past year. In the entire time I've been using them, I have only had a problem with two tools, both of which were the most used at the time. Both were repaired by the official DeWalt repair Centre in the U.K. under warranty, and neither tool has given any problems since.
I have the hog ring version of the brushless 1/2" impact driver and it is an awesome tool. I can change a set of wheels on my track car in a few minutes.
I have no need for a pneumatic impact wrench, it is more than capable of everything that I need. I paired it up with a set of Tekton impact sockets and extensions based on their recommendation by 'Real Tool Reviews' on YouTube.