I never found a foot that gave me good results for 1/4". What I do instead is place a physical adhesive guide on the bed of my machine, measuring it myself to give me a scant 1/4". I used to use moleskin (purchase in the foot section of any pharmacy), but recently found these Dritz adhesive guides which I like even better because they are taller:
http://www.amazon.com/Dritz-Quilting...dp/B0085L2Y2I/
As I recall they were about $3 at my local JoAnn Fabrics.
I do *not* recommend the red ruler Dritz sells for marking the 1/4" seam. It measures an *exact* 1/4" which will result in too wide a seam when you iron. I use my own cutting ruler to mark the seam instead. I place the ruler under the presser foot, manually lower the needle until it is just to the right of my 1/4" line on the ruler, lower the presser foot to hold the ruler in place, check the lines going front to back against the bed of the machine to make sure that the entire ruler is straight-on, then butt the adhesive guide up against the right side of the ruler.
A physical barrier works a lot better than a foot, in my opinion. With this barrier I can sew seams very fast and get perfectly even seams for the entire length (and no eyestrain from trying to make sure fabric is lined up).