I tried the Ultraboost and didn't find them comfortable at all. This one is my favorite sneaker if I have to wear one. Nike Flyknit Racer. Crazy lightweight. You pick up the box thinking it's empty. I have AirMax 2016, 2017, Flynkit Free RN, VaporMax, Kobe 11 Elite, but the Racer is the most comfortable.
But the best shoe I have ever worn are my Vibram KSO EVO. I wear them to work and workout in them.