The layout of your foundation is critical to success on this!
The other challenge for me is making a straight line (see the pathetic outline/frame stitches). Who knew that would be so hard! Lines want some practice, or some guide marks perhaps.
One really helpful thing I learned from watching Leah's videos, is to take your time - stop and look where you need to go next! I have a tendency to try to figure it all out on the fly, and end up not making the lines flow and fill as well as they could. I need to keep working on that relaxed stop-and-go attitude (hurry-er is not better - it's not even faster!).
Oh yes, and I took Leah's advice to use grippy gloves, but since I don't have any "Machingers", I just used a new pair of gardening gloves (with the little sticky bumps on the fingertips). They worked great and really helped me control the fabric.