about 2 weeks ago i cracked out some cards for the first time, to put them into Ultra-Pro sheets. BVG, PSA, and SGC. I used only a flat head screwdriver for all 3. SGC and PSA were both quick, like under a minute, and the cases were kept in tact. Just wedge it into the seam and twist until it gives. When it gives, slide it in and run along seam. For BVG, it was very similar, but took a couple mins (for me) to break the seam cuz the plastic chips away. I think I broke open 3 BVG holders and all 3 I had to snap pieces of plastic away before being able to break the seam.
Rob