I haven't used those products so can't comment on them. They look bulky and I wouldn't like extra rulers laying on the side of machine area.
Are you looking for the perfect 1/4 inch seam? If you are having problems with seams, I use the index card method to check allowances and adjust accordingly. You can also place of tape on the needle plate area to help. Easy to remove and replace as needed. Plus keep your right index finger along the fabric and help guide the fabric right into the needle plate area.
Mark a piece of scrap muslin with the desired seam allowance and practice hitting the line with stitching. It gets easier. Hope that helps!