I picked up the 2-disk special edition earlier this year. Hadn't seen it since the first time I watched it waaaaaay back in '87 or so, but I earlier this year I came across my copy of Broken Mirrors, Broken Minds (an in-depth dissertation on all of Argento's films up to Trauma), which in turn resulted in a renewed interest in Argento, so I ordered a bunch of his older flicks.
I only thought it was okay when I saw it in my teens, but thought maybe as an adult, and now after re-reading the write up in the book on Bird, I'd see it differently. And I did see it differently. This time, I didn't like it at all.
The flick may be considered a classic but for me, it doesn't come close to what I consider his best gialli, Tenebre and Opera.
Just my opinion.