I bought it and it works great. I tend to do a lot of ruler work. Before purchasing this foot, I would always need to compensate and plan how to do ruler work in order to be accurate. Even so, sometimes the lines would not be accurate.
I have to say I bought the interchangeable set when it came out, thinking the ruler foot included in the set was a true 1/4" foot. It is not. Now I rarely use any of those feet. If I had to choose, I would definitely get the 1/4" foot. You may need to raise the hopping foot a tiny bit to accommodate the new foot.