What I love is how good it is at picking up my boilerplate. It learns very quickly my own patterns and saves me a lot of typing because of that.
Sometimes it's not but it is enough to be very valuable.
I'll admit I don't leverage this savings into any massive productivity benefits that my CTO is going to notice, but it does significantly reduce my fatigue throughout the day which keeps me sharper, happier, and more energetic later into the day.