I currently own a
Lenovo Yoga 720 and I find it to be so useful in my course of study. I have owned it for roughly 3 months now and so far the touch screen is great, been through a few windows updates and so far nothing is broken yet. I have noticed that there will be a higher battery drain if you keep using it excessively (like when I'm in class taking notes, I write on my screen continuously for a total of maybe 6 hours?), but if you use it occasionally you shouldn't find any issues with battery life.
I would definitely recommend you choose a laptop with a dedicated stylus which is usually a palm rejection stylus so that writing on a touch screen is much easily, eg like a surface pro/laptop, lenovo yoga series, acer spin series, etc.
One thing I don't like about my laptop is that even when it can fold into a tablet mode, it's still a little too heavy for my liking to be holding it in my arm or in general for viewing and writing, it has to be placed on a table or on my lap so that I can comfortably write on it. If this is something you see yourself needing, then I would suggest getting a lighter tablet.