I have the JF frame and it works great for me. I bought the six ft folding table at Lowes and put my machine in the middle and I have plenty of room on both sides. The folding table is easy to store, will fit under a bed or behind a sofa if you can't leave it up all the time. I have used several models of LAs and the JF frame took much less time for me to learn and it's much faster to load a quilt on it. As with any new tool, it takes practice and frequent use to get comfortable using it. I have rods up to king size and will use two table when doing a quilt that big but seldom machine quilt that size, I send those out to be quilted or use the section quilting method.
I sit down when I'm using it.