Love oat milk, specifically Silk's Oat Yeah!
I think it's a good replacement. Since I eat a lot of _replacement_ foods, you kind of learn that you don't need that 100% to appreciate it for what it is. It's all learned taste.
I usually drink my coffee black, but a long time ago I made the switch to soy milk, and after a while it became natural in coffee. Oat latte's are pretty great too.