I use this technique, too. I clip about every 5 stitches, then pull the bottom thread.
I really like the Clover seam ripper that is pictured, because the point is very sharp. I won't buy a Dritz seam ripper any more, because the point is blunt compared to the Clover. But I've started buying the Clover with the flat handle. The white ones always seem to roll away, and they end up under the furniture, with me on my hands and knees trying to find them.