can you accidently turn a page by glancing your finger over the pageturn button?
No, you have to press the button; just brushing over it doesn't turn the page.
I hold the NST in one hand with my thumb resting on the button without any accidental page turns.
As I said, I like how the NST buttons work, but others think they're too hard to press.
If possible, you should try them yourself before making a decision.