Yes, a walking foot is the best route ..... however, there are times when you want to straight line quilt in the midst of FMQ ....... and IMHO this would be the way to go.
I've "played" with it a bit and I think one could get the knack of it with some practice.
As with most things ... what works for one, is not for the others.
There's no rules!!!
Depending on how your machine is set, you might even find that you can use your regular quilting rulers (that we measure with) to do the job.
Give it a try and decide for yourself!
