I have one for my Bernina & it actually makes my stitching worse. Even when I adjust the tension on my presser foot, it just digs into the quilt sandwich too much & I end up veering off course. What I prefer is the open-toe walking foot.
But it's really a personal/machine preference. Some machines work best with the ditch guide. Others don't. Some people like having that "blade" running along their ditch, others prefer an open toe to be able to visually identify the ditch. You'll really just have to try it out and see what works best for you.