Just watched it for the first time.
I saw this movie on "Bravo's 100 Scariest Movie Moments," and I thought it looked really interesting (too bad they showed "that scene.") so I bought the DVD.
Prior to this, is never seen an Audrey Hepburn, so I was able to watch it completely unbiased (I'd heard of her; who hasn't?) and I thought she did a very good job. There were some parts where I thought she could have been a bit more expressive, but then I remembered that she was playing a blind lady, and, of course, acting styles were different back then, but I'm a fan of old movies, so I'm used to that.
I thought the movie was tight, well-paced and very tense, especially towards the end. I followed some online suggestions and watched it in the dark, on my own, and I'm glad I did.
I don't think there was anything I didn't enjoy about the film, and when "that" scene came, I actually let out a scream! And I knew it was coming.
So, yeah, I loved it, I made my mum watch it, she loved it too, and it's now definitely in my Halloween countdown list. :)