I run almost all Milwaukee and my tools get used hard. I remodel and do custom tile. Milwaukee has been solid for me, though not immune to problems. Nothing major, couple old old batteries that have given up. I ran Makita for about 10 years at my last company and honestly never really had issues with them either, other than the 18v brad nailer. Thats probably the single worst tool i have ever owned.
The actual reality of it is, Makita, milwaukee and dewalt are so close that it doesnt really matter. Pick which color you like best, or figure out which tool youll use the most often (impact? Driver? Multi tool?) And see which one from which brand is the most comfortable in your hand. I honestly dont believe there is an actual best.