This foot of course has nice visibility with the shank being off (which you can also achieve with the modified ankle on the other foot...see my post about this HERE) and was nice to stitch with, although I feel that it is a tad more temperamental with its wide opening. My settings were:
Spring foot freemotion mode
Needle: 70/10 with Aurifil 50/2 thread
Tension: 3.4 (this varied a bit over the last few days...I swear that the cold is affecting the tension)
Straight stitch needle plate
On the whole it behaved itself and I had only a few skipped stitches which I was relieved about. I think when I first tried it, I had more trouble with that given the opening. In terms of stitching, I would be lying if I said I saw or felt a difference to the other foot (Dynamic 6D). Each stitches equally well. My sense is that the Open Toe Freemotion Spring foot is best suited to slower designs... mind you, I have not tried it on a faster design like swirls where you constantly change the speed of your stitching. Something to try out.
Until next time