I bought the screen protectors for my Alpha 77 and I'm thrilled. Compared to films is firstly the attachment far easier, it can give no bubbles form. Therefore, the attachment to the exact alignment of the disc limited. Second, the view of the display is full. Third, the screen protectors is of course better.
In my SLT-A77, there were no problems with the way the folding mechanism, the display can also be folding in with disc effortlessly. To the imprint "for digital camera A65 / 77" at the bottom I would, however, also have done without, especially as the price of the small disc in my opinion is not exactly cheap.